Find the period and the amplitude of the periodic function y= -5 cos 6x

Question

a. period = 1/3pi, amplitude = -5
b. period = 1/6pi, amplitude = 5
c. period = 1/6pi, amplitude = -5
d. period = 1/3pi , amplitude = 5

Answer 1

amplitude is always positive
cos(kx) has period 2π/k

Answer 2

please anyone got the answer

Answer 3

1.A
2.C
3.C
4.D
5.B
6.A
7.D
8.A
9.B

Answer 4

so wuts the answer?

Answer 5

lllllllllllll

period=1/3pi, amplitude=5

Answer 6

tf...