Six Trigonometric Ratios Worksheet. Notes: TRIGONOMETRIC RATIOS Geometry Unit 6 - Right Triangles & Trigonometry Page 411 TRIGONOMETRIC RATIOS: Ratios of the lengths of the sides of a right triangle (related to the acute angles). Solve the triangle 3 9 In this triangle we have two sides Special Right Triangles Note: Triangles in this section are always right triangles! 11. 1. The worksheets are for individual use only. 6. Ch. As students to consider a point P (x, y) on the unit circle with radius r = 1, making an angle with x-axis. Plus each one comes with an answer key. . One radian is the measure of a central angle of a circle that is subtended by an arc whose length is equal to the radius of the circle. These trigonometric ratios (trig ratios) will be introduced through the following exercises, each of which refer to the diagram below. We have provided below free printable Class 10 Mathematics Trigonometry Worksheets for Download in PDF. 8. Express each ratio as a fraction. This poster displays all six trig ratios, sine, cosine, tangent, secant, cosecant, and cotangent. Fronteirastral. Age range: 14-16. Question 2: Find the size of the angle marked q q to 1 1 decimal place. 6. A basic trigonometry worksheet for those learning to use the sin, cos, and tan ratios to find the length of an unknown side (15Q) or the degrees of an unknown angle (10Q). 1) tan Z 28 21 35 Z Y X 3 4 2) cos C 16 34 30 C B A 8 17 3) sin C 21 28 35 C B A 4 5 4) tan X 24 32 40 X Y Z 4 3 5) cos A 30 16 34 A B C 15 17 6) sin A . (Worksheet T1 may help you!!) Let us have a look at the right-angled triangle shown below. 7. (/6. Access some of these worksheets for free! 7) cos C 20 21 29 BC A 8) cos A 16 30 34 A C B 9) cos C 40 9 41 C B A 10) tan Z 20 21 29 Z X Y 11) tan A 40 30 50 A C B 12) cos X 21 20 29 X Y Z -1- 11. . X Q K .

3. Simple Trigonometric Ratios Worksheet (with Answers) by.

State the six trigonometric ratios for angles A and B in the triangles below. U5D4 Lesson Video link of Mrs. Behnke teaching this. 6. Activity/worksheet. Find the 5 . Unit 2 graphing trigonometric functions Unit 3 general triangles Cumulative Material Unit 4 _trig pdf Answers in the back 5 A C 38 3) 3 A 2 B C 4) 16 B C A 59 5) 12 6 A C B 6) 5 A B C 61 7) B 3 A C 51 8) 2 A C B 53 9) 3 3 AB C 10) 13 A C B 65-1- pdf solutions_to_review_66q They are often shortened to sin, cos and tan They are often . Find the other five trigonometric ratios of the angle A. For part b, state the ratios as decimals rounded to the nearest hundredth. 1) 3 5 2) 5 3 3) 4 5 4) 4 3 5 Which ratio represents cosA in the accompanying . cos 24 5. tan 86 6. tan 42 Use the tangent ratio to find the variable . 7. Pre-K; Kindergarten; 1st Grade; 2nd Grade; 3rd Grade; .

Trigonometric Ratios Worksheet TRIGONOMETRIC RATIOS WORKSHEET 1. May 10, 2020 - 6 SIX TRIGONOMETRIC RATIOS: How To Find Ratios in Trigonometry? In applying trig ratio worksheets feature is a random order they apply it, finding general worksheet answers thank you may disclose that hit joplin. Printable Math Worksheets @ www.mathworksheets4kids.com Name : 1) 2) 3) 10 X Y Z 8 P Q R 16 2 24 21 20 M K L Six Trigonometric Ratios Sheet 1 sin K = tan K = cos K = 21 29 21 20 20 29 . Example: 1 divide by root 2 can be written as root 2 over 2. This website uses cookies We and our advertising partners use cookies and other tracking technologies to improve your browsing experience on our website, to show you personalized content and targeted ads, to analyze our website traffic, and to understand where our visitors are coming from. We also have NCERT Solutions for Class 10 Maths , Class 10 Maths Notes worksheets and Assignment free on our website along with trigonometry questions for class 10 ssc pdf" from: MSM G 11 Teaching and Learning Trigonometry Slides in PDF "Thus", all trig functions will have the same value when evaluated 2 radians apart 31kb; Algebra 2 11 . 45-45-90 Triangles Theorem 1: In a triangle whose angles measure 45 0, 45 0, and 90 , the hypotenuse has a length 0 equal to the product of 2 and the length of either leg There are 3 of these . The rest . Search: Grade 11 Trigonometry Practice Test Pdf. Trigonometry Ratios Table Trigonometry Formula. 1. 3. 9 Trigonometric Ratios. Step 2 Consider the sides which are involved and write the trigonometric ratio con-taining these . When a ladder is rested against a tree the foot of the ladder is 1 m from the base of the tree and forms an angle of 64 with the . Trigonometric Ratios A RATIO is a comparison of two numbers. Law of Sines and Cosines Worksheet. [2 marks] Level 4-5 GCSE. 12. Trigonometry Worksheet T3 - Calculating Sides Work out the sides labelled. In triangle ABC, right angled at B, 15sinA = 12. 7. cos 27 8. tan 5 9. sin 48 10. cot 81 Find the basic angle that satis es this ratio {this may involve looking at the angles in the two special triangles or looking at the . Ambiguous Case of the Law of Sines. 5. Converges by ratio test WorksheetWorks Worksheet 3:6 Arithmetic and Geometric Progressions Section 1 Arithmetic Progression An arithmetic progression is a list of numbers where the di erence between successive numbers is constant Mathematics worksheets for class 6 CBSE includes worksheets on Ratio and Proportion as per NCERT syllabus Conceptual . 3 Which ratio represents sinx in the right triangle shown below? Support maintaining this website by sending a gift through Paypal and using my e-mail abdelkader.a@gmail.com. Trigonometry helps us in finding the missing sides and angles by using the trigonometric ratios. Bronte Clarke. There are six trigonometric angles, namely sine, tangent, cosine, cosecant, secant and cotangent.

Simplify all fractions, rationalize and simplify all radicals, and convert all decimal answers to fractions. 1) 10 8 2) 8 6 3) 6 10 4) 8 10 2 The diagram below shows right triangle UPC. Definition of radian: Radians are an angular measurement. [2 marks] Level 4-5 GCSE. x 9 32 x 12 35 x 4 73 15 x 20 x 83 9 x 6 33 x 25 15 x 4 79 x 9 55 Math 4 Trig Ratios Worksheet Name:_____ Solve for x. 2. 12. Now calculate the length of side b to the nearest hundredth. Games, activities and quizzes to help you learn and practice trigonometry, We have games for SOHCAHTOA, Right Triangles, Trig Ratios, Unit Circle, Trig Identities, Trig Formulas, Law of Sines, Law of Cosines, Trigonometric Graphs, Inverse Trigonometry and Quizzes, examples with step by step solutions, worksheets EXAMPLE 1 : Find sin A, cos A tan A, sin B, cos B, and tan B. 10. The Chino Valley Unified School District is committed to equal opportunity for all individuals in education and employment. Here are the formulas for these six trig ratios: Given a triangle, you should be able to identify all 6 ratios for all the angles (except the right angle). 1) 15 8 2) 15 17 3) 8 15 4) 8 17 2. In a right triangle: Exercise #3: tan A= tan C = Exercise #4: sin A = sinC = Exercise #5: cos A= cos C = A Helpful Mnemonic For Remembering the Ratios: HIGHLIGHTED . 2. 12.1 Worksheet Name _____ SOH CAH TOA . Now that students understand what a unit circle is, you can proceed by explaining trigonometric functions on it. b. Real-life examples of trigonometric ratio include areas such as astronomy, geodesy, surveying, and navigation. 11. Trigonometric ratios 6 Trigonometric ratios ID: 959856 Language: English School subject: Math Grade/level: grade 9 Age: 14-15 . By solving Trigonometric ratios worksheets, you'll understand that the trigonometric ratios are given by the trigonometric functions of the known angle A, where a, b, and c are lengths of the sides of the figure produced. Some of the special trigonometric identities are as given below - 1. 15) cos 10 0.9848 16) sin 60 0.8660 17) csc 21 2.7904 18) cos 60 0.5000 19) tan 40 0.8391 20) csc 59 1.1666 21) csc 56 1.2062 22) cot 65 0.4663 23) tan 10 0.1763 24) tan 25 0.4663 Find the value of the trig function indicated. Trigonometric ratios are used when one has to find the ratio of the sides of a right-angled triangle. Six Trigonometric Ratios Worksheet. In trigonometry, there are six trigonometric ratios, namely, sine, cosine, tangent, secant, cosecant, and cotangent.These ratios are written as sin, cos, tan, sec, cosec(or csc), and cot in short. The rest . 24 Use trig ratios and your calculator to approximate each length to the nearest tenth (these are all RIGHT triangles). 7.2 9 13 10 1) Sin A = 2) cos G = 3) TanM= 4) Sin S = 5) CosD- 6) TanW= 7) SinJ= 8) cosv= 10 51 45 9) TanC= 2.1 7.5 .06 25 6dG 17) cosc= 18) TanH= 19) SinT= 20) CosF= 21) TanP= 22) SinM= 23) cosw- 24) TanL= 10) 11) 12) 13) (If you didn't finish Worksheet 9A - given out after the Unit 8 Test - make sure you do that now!) 7. I . Trigonometry Worksheet With Answers Learn then find that missing angles for a. Discovering Trigonometric Ratios Students . More Trigonometric ratios interactive worksheets. Important observations about the six trigonometric ratios. Six Trigonometric Ratios Worksheet. 9. cos(1650)= Solve for x, O -'? Understand that by similarity, side ratios in right triangles are properties of the angles in the triangle, leading to definitions of trigonometric ratios for acute angles. Use the cosine ratio to find the variable . These six angles are used in all trigonometric ratios calculations. Complete the Unit Circle Worksheet. 4. Regents Exam Questions G.SRT.C.6: Trigonometric Ratios 1a Name: _____ www.jmap.org 2 3 Which ratio represents sinx in the right triangle shown below? 8. The tangent is the ratio of the sine to the cosine. 10. Step 1 Label the sides of the triangle, which are either given, or need to be found, using the symbols O, A, H with respect to the angle in question. 2. Free trigonometry worksheets, in PDF format, with solutions to download. Which trig ratio? sin x + 1 = 0 =) sin x = 1 p 2cos(x + 5 6) 1 = 0 =) cos(x + 5 6) = 1 p 2 2. a) Use the triangle below to find the six trig ratios Example 6 Use the triangle below to find the six trig ratios Need more help? a) b) 2. 1) 15 8 2) 15 17 3) 8 15 4) 8 17 3 Which ratio represents sinx in the right . 9. Worksheet Solutions; Sine, Cosine and Area of a Triangle: Worked Solutions: Trigonometric Graphs: . To review the ratios, consider a triangle ABC with angle as marked. Use the sine ratio to find the variable . If the inclination of the string with the ground is 31, find the length of string. A. The three known and commonly used trigonometric functions are sine cosine and tangent, which are abbreviated as sin, cos, and tan, respectively. Assignment # 11 ( Review Worksheet - Solving Trig Equations (15) TEST INTRODUCTION TO TRIGONOMETRY. Create your own worksheets like this one with Infinite Geometry. 3. G.SRT.C.6: Trigonometric Ratios 1a 1 In ABCbelow, the measure of A=90, AB=6, AC=8, and BC=10. Name: WORKSHEET: The Six Trigonometric Functions For 1 - 3, Evaluate the six trigonometric functions of the angle . Explore. Toggle navigation. CCSS: G.SRT.7 EXPLAIN and USE the relationship between the sine and cosine of complementary angles. Teacher Stuff. Example Questions.

6. six trigonometric ratios interactive and downloadable worksheets. you will need to work out which to use and how! . 4.266666666666667 27 reviews. 8. Ch 6 Trig. Worksheet 3:3 Trigonometry Section 1 Review of Trig Ratios Worksheet 2:8 introduces the trig ratios of sine, cosine, and tangent. Use trig ratios to solve for lengths of the triangles as needed to end up solving for X. Point out that we can write the six trigonometric ratios in this way: Worksheet Solutions; Sec, Cosec and Cot: Worked Solutions: Trigonometric Identities: Which ratio represents the sine of U? Law Of Cosines. 1. Opposite refers to the side of the triangle that is opposite of the reference angle you will need to work out which to use and how! Trigonometric ratios by ticerzaleha: Introduction to Trigonometry by dinkar: Trigonometric ratios 7 by suadzuhair: Six Trigonometric Ratios Worksheet. 12. 1) 10 8 2) 8 6 3) 6 10 4) 8 10 2 The diagram below shows right triangle UPC. G.SRT.C.6: Trigonometric Ratios 1a 1 In ABC below, the measure of A =90, AB =6, AC =8, and BC =10. Trigonometric Ratios Date_____ Period____ Find the value of each trigonometric ratio. 8. 2 The diagram below shows right triangle UPC. The Greek letter, , will be used to represent the reference angle in the right triangle. The three most common ratios are SINE, COSINE, & TANGENT. Which ratio represents the sine of U? . 8. These Worksheets for Grade 10 Mathematics Trigonometry cover all important topics which can come in your standard 10 tests and examinations. For part a, state the ratios as exact fractions. 10. A kite is flying at a height of 65 m attached to a string. Pinterest. 3. Use the cosine ratio to find the variable . 2. Complete remaining examples from the lecture notes. Contents. 1) 3 5 2) 5 3 3) 4 5 4) 4 3 5 Which ratio represents cosA in the accompanying . These trig ratio worksheets feature exercises to identify the legs, side and angles, introduce the six trigonometric ratios, find the indicated sides and much more. The cosecant is the inverse of the sine. In the right triangle shown below, find the six trigonometric ratios of the angle . The foot of the ladder is 3 m from the wall. 1) sin 12 2) cos 14 3) cos 52 4) cos 24 5) tan 51 6) cos 35 Find the value of each trigonometric ratio. G.SRT.C.6: Trigonometric Ratios 1b 1 In ABC below, the measure of A =90, AB =6, AC =8, and BC =10. A worksheet designed to be printed back to back and folded to make an A5 booklet. For any right triangle, there are six trig ratios: Sine (sin), cosine (cos), tangent (tan), cosecant (csc), secant (sec), and cotangent (cot). 6 Trigonometric Functions. Trigonometry worksheet 6 contains word problems. Thanks for this -- I adapted for use in an introductory lesson to trigonometric ratios (which I have now uploaded). This worksheet and quiz let you practice the following skills: Critical thinking - apply relevant concepts to examine information about how to find trigonometric ratios in a different light . Free trial available at KutaSoftware . Mathematics Geometry. Pythagorean Identities. Sine Cosine and Tangent to particular side room of dread right triangle. Today. . Use the sine ratio to find the variable . If you multiply the numerator and the . @ Questions usually ask for an answer to the nearest units This quiz and attached worksheet will help gauge your understanding of how to find trigonometric ratios The inverse trigonometric functions sin-1, cos-1, and tan-1 are used to find the unknown measure of the angle of a right-angled triangle when you are of the two side . Subject: Mathematics. For 4 - 6, find the missing side lengths x and y. 12.1 Worksheet Name _____ SOH CAH TOA . . Which ratio represents the sine of B? 7. Here is a set of meticulously crafted printable trigonometric ratios worksheets for high school students to get their basics right. 3_Trigonometric Ratios 2 Any Angle_Modif_2020.docx. In this guide, we will cover: A review of the three fundamental trigonometric ratios: sine, cosine and tangent; The reciprocal ratios secant, cosecant and cotangent; Exact trigonometric ratios; Related angles and trigonometric ratios; Trigonometric ratios for angles in other quadrants; Solving trigonometric equations. Trigonometric Functions on a Unit Circle. 3. sin 63 4. Which ratio represents the sine of B? Question 1: Find the length of the side marked p p to 3 3 significant figures. Which ratio represents the sine of B? Q1: Find the main trigonometric ratios of given that is a right triangle at , where = 3 0 c m and = 1 8 c m. A s i n = 3 5 . . (A) sin30o (B) tan0 (C) cos 2 (D) csc90o (E) 3 sec 2 2 This quiz and attached worksheet will help gauge your understanding of how to find trigonometric ratios 2: Worksheet - Proving Trig Identities (1) Download: Download Download: 6 2: Worksheet - Proving Trig Identities (1) Download: Download Download: 6 .. Other Useful Trig Formulas Law . 430 The Six Trigonometric Ratios: Sine, Cosine, Tangent, Secant, Cosecant, and Cotangent What to Know Lesson 1 will help you recall the different concepts about triangles. In right triangle Trigonometry there are six possible ratios (functions). Math Anchor Charts. 6. WORKSHEETS: Regents-Trigonometric Ratios 1a GEO/IA/A MC: 4/14/2: TST PDF DOC: Regents-Trigonometric Ratios 1b GEO/IA/A bimodal: TST PDF DOC B: Solving Trig equations 1. 17 January 2015. . 4. cos 24 5. tan 86 6. tan 42 Use the tangent ratio to find the variable . Honors Algebra II/Trig Unit 8A Worksheet 6: Trig Functions Name: Find the six trig functions for the following: 1. = . Regents Exam Questions G.SRT.C.6: Trigonometric Ratios 1a Name: _____ www.jmap.org 2 3 Which ratio represents sinx in the right triangle shown below? 9. 9. To determine which one of the three trigonometric ratios to use in each case, follow these steps. 9. The Trigonometric formulas or Identities are the equations which are true in the case of Right-Angled Triangles. Find the value of each trigonometric ratio using a calculator. 5. Word Problems Using Right Triangle Trig Draw pictures. In this worksheet, we will practice finding and express the values of the three trigonometric ratiossine, cosine, and tangentfor a given angle in a right triangle. 4. 7 6 13 6 7 Find the value of each. $2.50. Super Teacher Worksheets. 1. sin + cos = 1; tan 2 + 1 = sec 2 ; cot 2 + 1 = cosec 2 ; sin 2 = 2 . (This sheet is a summative worksheet that focuses on deciding when to use the law of sines or cosines as well as on using both formulas to solve for a single triangle's side or angle) Law of Sines Ambiguous Case of the Law of Sines Law Of Cosines Sine, Cosine, Tangent Worksheets SOHCAHTOA Sine, Cosine, Tangent, to Find Side Length 5(/4. In the right triangle shown below, find the six trigonometric ratios of the angle . Round your answers to the nearest ten-thousandth. These ratios are mainly measured in degrees and radians.

Trigonometry Worksheets, Worksheets for 4th grade, 5th grade, 6th grade, 7th grade and middle school. Trigonometry worksheet 5 contains questions on the sine rule. Questions 1 and 2 require Sine, questions 3 and 4 require Cosine, question 5 and 6 require Tangent. The secant is the inverse of the cosine. View Worksheet 6 - Trig Values.pdf from MATH 565 at Bolingbrook High School. This will guide you to define and illustrate the six trigonometric ratios.

DAY 1: SWBAT: Calculate the length of a side a right triangle using the Pythagorean Theorem Pgs: 1 - 4 HW: 5 - 6 DAY 2: SWBAT: Find the three basic trigonometric ratios in a right triangle Pgs: 7 - 10 HW: 11 - 12 DAY 3: SWBAT: Use Trigonometric Ratios to find missing lengths of a right triangle Pgs: 13 - 17 HW: 18 -19 purpleak. 3. sin 63 4. Our maths trigonometry worksheets with answers will help your child or student to grasp and understand basic and more advanced ways of solving trigonometric equations 1 Determine whether a relationship is a function and identify independent and dependent variables, the domain, and range Name_____ Trig Word Problems Worksheet 1 3 4 rotation . Prepa Tec High School. 7. If we draw our common angles on the unit circle we get. Question 3: (Non-calculator) Write down the exact value of \sin (w) sin(w). (Worksheet T1 may help you!!) . A ratio is a comparison of two numbers (or sides of a triangle) by division. A very long time ago, these ratios were given names. 5 10 5 5 O. Resource type: Worksheet/Activity. Trigonometry worksheet 7 finds area of triangles. A ladder is leaning against a vertical wall makes an angle of 20 with the ground. Rearrange the equation to make the trig ratio (usually sin, cos or tan) the subject e.g. Read Sec 2.4. PDF.

. 9. 3(/2 SPECIAL VALUES of Trig functions: You MUST have the values of all of the trig functions at . Answers are also provided on the worksheet so students are able to check their work and self assess. District programs, activities, and practices at any district office, school or school activity shall be free from discrimination, including discriminatory harassment, intimidation, and bullying, targeted at any student or employee by anyone, based on actual or perceived . Find the length of ladder. Show . Show . Either open the file and print or download and save an electronic copy and use when needed. Converges by ratio test WorksheetWorks Worksheet 3:6 Arithmetic and Geometric Progressions Section 1 Arithmetic Progression An arithmetic progression is a list of numbers where the di erence between successive numbers is constant Mathematics worksheets for class 6 CBSE includes worksheets on Ratio and Proportion as per NCERT syllabus Conceptual . Let's start by finding all 6 ratios for angle A . Using trig ratios, find the length of side a to the nearest hundredth. Trig Ratios to find missing lengths and angles together with questions on elevation/depression as well as bearings make for a good challenge. Questions 1 and 2 require Sine, questions 3 and 4 require Cosine, question 5 and 6 require Tangent. 1) 28 53 2) 28 45 3) 45 53 4) 53 28 4 Which ratio represents the cosine of angle A in the right triangle below? Six Trigonometric Ratios Sheet 1 Find the exact values of six trigonometric ratios for the mentioned angle. In this worksheet, we will practice determining if a series is convergent or divergent using the ratio test 4:3 is the ratio of squares to circles Math workbook 1 is a content-rich downloadable zip file with 100 Math printable exercises and 100 pages of answer sheets attached to each exercise Rates and Ratios Worksheet 4 Introduction to Ratios . Trigonometric ratios can be used to determine the ratios of any two sides out of a total of three sides of a right-angled triangle in . STANDARD G.SRT.C.6 GEO. For 7 - 14, use a calculator to evaluate the trigonometric function to four decimal places. Search: Trig Worksheet Answer Key. 1) 28 53 2) 28 45 3) 45 53 4) 53 28 4 Which ratio represents the cosine of angle A in the right triangle below? These trig ratio worksheets feature exercises to identify the legs side and angles introduce the six trigonometric ratios find the indicated sides and much more. b c a A C B The hypotenuse (hyp) of the triangle is c; the adjacent (adj) side is b; the opposite (opp) side is a. 3. The zip file includes three convenient sized pdfs for printing by you or you local print shop: - 11 x 8.5 in - 17 x 11 in - 24 x 18 in. Click below for a Khan Academy Video Khan Academy video 2 First use Pythagorean Theorem to find the hypotenuse a + b = c, where a and b are legs of the right triangle and c is the hypotenuse 6 + 8 = Presentation Transcript. 7. Trigonometry Worksheet T3 - Calculating Sides Work out the sides labelled. View Worksheet Finding Trig Ratios (Answer Key).pdf from SC MATH 3020 at York University. In Trigonometry, the comparison is between sides of a triangle ( right triangle). 5. Use trig ratios to solve for lengths of the triangles as needed to end up solving for X. It displays in an architectural blue-print design so that it looks nice on any wall. The cotangent is the inverse of the tangent.

Special right triangles are useful for quickly remembering important trigonometric ratios such as sin30, cos30 and tan30, sin60, cos60 and tan60, sin45, cos45 and . Answer Kuta Software - Infinite Algebra 1 Finding Trigonometric Ratios Date_ Period_ Find the value of each 4 Which ratio represents the cosine of angle A in the This math worksheet was created on 2016-09-13 and has been viewed 53 times this week and 200 times this month Trig Worksheet Answer Key cot= = =cos sin 2 Worksheet 1 Class IX These trig ratio worksheets feature exercises to identify the legs, side and angles, introduce the six trigonometric ratios, find the indicated sides and much more (you can . Last updated. (Where it says the angle is between 0 and 2 pi, treat it as the angle is between 0 and 360) NOTE: Some answers may be in a different form with the denominator a rational number. A triangle is a right triangle if one of the angles is equal to 90 degrees. 12. 1/22 2-4 Lesson 1 : Incredibly Useful Ratios Homework Worksheet 1/23 5-6 LESSON 2: Using Trigonometry to find missing sides Homework Worksheet 1/24 7-9 LESSON 3: Using Trig to find missing angles measures . Round to the nearest hundredth. Ch. 10. 10. The worksheets have been designed based on the latest NCERT Book for Class 10 Mathematics Trigonometry. 4 6 reviews. Trig Ratios Worksheet - Trig Ratios Worksheet , Sine Ratio Worksheet Worksheets for All. 8. When the moon is exactly half full , the earth, moon, and sun form a right angle (see the figure below). 11. Which ratio represents the sine of U? For example; boys to girls cats : dogs right : wrong. UNIT CIRCLE: A point (x, y) is on the unit circle (circle with radius 1) if . (This sheet is a summative worksheet that focuses on deciding when to use the law of sines or cosines as well as on using both formulas to solve for a single triangle's side or angle) Law of Sines. Activity 1: Triangles of Different Sizes This activity helps you recall the concepts of similar .