1. Which of the following is the correct compound angle formula for cos (a + B)? (m) cosa sin f - cos/ sin a (n) cosa sin a + cos B sin B Mark Value: 3 (o) cosa cosf - sin f sin a (p) cosa sin p + cos 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