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

$\displaystyle y=3cos(2x+pi)$

What I think it should be:

amplitude=3

period=$\displaystyle pi$

phase shift=2

2. Write the equation of sine that has the given characteristics:

amplitude=3

period=$\displaystyle pi/2$

phase shift=2

What I think it should be:

$\displaystyle y=3sin[3(x-2)]$