Question

What are the phase shift and period for the function y = 3cos[4(θ + 60°)] − 2?

Answer 1

The function can be expanded as follows:

`y=3\ cos(4\theta+240)-2`
The phase shift is:

`(240)/(4)=60\ degrees`
The period is:

`(2\pi)/(4)=(\pi)/(2)`