period and phase shift of a function

What is the period of: f(x)=2sin(-3x)
The phase shift of the function: f(x)=2cos(3x-pi)

Jhun Vert's picture

Period = 2π / 3
phase shift = π / 3

RSpekter's picture

how to compute for that sir?

Jhun Vert's picture

For y = a sin (bx + d)
period = 2π / b
phase shift = d / b