!unit 6: periodic functions and trigonometry lesson 3: radian measure 1. find the period and the amplitude of the periodic function. a. 4; 2 b. -4; 4 c. 2; -4 d. -4; 2 2. use the given graph. determine the period of the function. a. -0.9 b. 6 c. 3 d. 1.5 3. which of the following angles is not coterminal with the other three? a. 591 b. 231 c. 51 d. -129 4. find the exact values of cos 150 and sin 150. a. cos = -1/2, sin = (sqrt*3)/2 b. cos = 1/2, sin = (sqrt*3)/2 c. cos = -(sqrt*3)/2, sin = 1/2 d. cos = (sqrt*3)/2, sin = -1/2 5. find the radian measure of an angle of -280. a. 9/-14pi b. -14pi/9 c. 9pi/-14 d. -14/9pi 6. find the degree measure of an angle of 3pi/5 radians. a. 1.88 b. 108pi c. 108 d. pi/30