1. use the graph of y=sin 2x to find the value of sin 2x for x=pi/4 radians. a. -1 b. 0 c. 0.5 d. 1 2. what is an equation for a sine curve with amplitude 2, and period 4pi radians. a. y = 0.5sin4x b. y = 4sin (x/2) c. y = 2sin2x d. y = 2sin (x/2) 3. sketch one cycle of the cosine function. y = 2cos2x c. graph* 4. find the period, range, and amplitude of the cosine function. y = -3cos4x a. period 3pi; range -3 < = y < = 3; amplitude = 1/2 b. period 1/2; range -3 < = y < = 3; amplitude = -3 c. period 1/2pi; range -3 < = y < = 3; amplitude = 3 d. period 3; range -3 < = y < = 3; amplitude = 1/2