PRE CALCULUS

SEMESTER NAME: GRADE & SECTION: page 108 This is a 3-page Quiz worth 30 points from module 4. ALL final answers should be written in blue or black ink only. Strictly NO ERASURE ( of any kind) or change in answer. 1. Read carefully the statements below. Write TRUE if the statement is always correct, otherwise, FALSE. Use the space provided before each item. (1 point each) 1. If the terminal side of an angle @ is in the second quadrant, and sin 0 = , then its reference angle is 30. 2. If the period of any given circular function is less than 27 (angle measured in radians), then the graph is compressed horizontally. 3. If the graph is stretched vertically, then its amplitude is greater than 1. 4. The amplitude of the function y = 2 tan 2x + 2 is 2. 5. If sin 0 > 0 and cos 0 1 has infinitely many x -intercepts. 9. The cotangent function is the inverse of tangent function. 10. The cosine graph is the same as the sine - only it's shifted to the left by 90 degrees, or - . Therefore, cos x = sin x + Read and analyze the questions then encircle the letter that correspond to your answer. (1 point each) 1. If cos 0 = -, and 0 is in the fourth quadrant, what is cot @? A. V77 C. _2V77 77 77 B. D. 9V77 77 2. If sin 0 = - 15 T and 0 is in the third quadrant, what is tan 0? A. C. 15 15 B B. 8 D. - 15 15 3. Which of the following has an amplitude equal to 2? A. f(x) = sin 2x C. f(x) = 2 csex B. f (x) = 2 tan 2x D. f (x) = -2cos 2x 4. Which of the following has a period equal to "? A. f(x) = sin 2x C. f(x) = 2csex B. f(x) = 2 tan 2x D. f(x) = -2 cos 2x