Question

Find the period and the amplitude of the periodic function.
y =- 4 cos 8x

period = 1/4, amplitude = 4
period = 1/4pi, amplitude = 4
period 1/2pi, amplitude = -4
period = 1/2, amplitude = -4

correct answers are above choose it plsss

Answer 1

period = 1/8, amplitude = 4