Unit 6 Test: Trigonometric Equations and Identities Name: Date: Category Total Marks Marks Obtained Knowledge and Understanding 15 Thinking 10 Communication 10 Application 15 The following curriculum expectations are covered in this evaluation: BI, B2, B3 Knowledge & Understanding: 1. Which of the following is the correct compound angle formula for cos (a + B)? (m)cosa sin B - cosB sin c (n) cas a sin a + cos B sin B Mark Value: 3 (o) cosa cosB - sin B sin a (p) cosa sin B + cosp sin a 2. Which of the following is not true about trigonometric identities? (e) The left and right sides of the identity must be modified independently. (f) It is usually easier to start working with the simpler side of the identity. (g) It is often useful to start by changing all trigonometric ratios to sine or cosine. (h) The identity can be simplified by finding a common denominator, factoring, expanding, or cancelling out terms. Mark Value: 4 3. Which of the following is not a solution to the equation sin x = 0, 0 s x 5 2a? (m)x = 0 (n) xml (0) X =17 (p) x = 2 Mark Value: 4 4. (a) Determine a simplified expression for cos(; - x). (b) Determine the exact value of sin( -) Mark Value: 4