Posted by Lauren on Friday, November 2, 2012 at 1:11am.
4. Write the equation of the cosine function with an amplitude of 1/3, a period of 2pi, and a phase shift of 3pi/2.
I got 1/3COS(1/2x3pi), but I really do not think that is correct D: any tips or advice?

Trigonometry  Steve, Friday, November 2, 2012 at 1:22am
why the half? cosx already has a period of 2pi.
1/3 cos(x3pi/2)