Find the amplitude, period, and phase shift of the given function.

Question

y = 4 cos(3x − (pi/4))

 

Amplitude=

Period=

phase shift=

Answer 1

y = a cos (bθ - h) + k, a = amplitude, 2π/|b| = period, h = phase shift

 

amplitude is 4

period is 2π/3

phase shift is π/4