# Math Help - Finding the Phase Shift of a Function.

1. ## Finding the Phase Shift of a Function.

I have the function (1/37)cos3t+(6/37)sin3t. I am asked to find the amplitude, which I found quite easily, and the phase shift, which I am having trouble finding. Any help, even a little nudge in the general direction of the answer, would help. Thanks in advance.

2. Originally Posted by rgrimm01
I have the function (1/37)cos3t+(6/37)sin3t. I am asked to find the amplitude, which I found quite easily, and the phase shift, which I am having trouble finding. Any help, even a little nudge in the general direction of the answer, would help. Thanks in advance.
You rewrite this in the form:

$
A \sin(\omega t+\phi)
$

using trig (the $\sin$ may be a $\cos$ if you are measuring phase shift wrt $\cos$ rather than $\sin$)

Then $A$ is the amplitude and $\phi$ is the phase.

CB