Answer it yourself using the following...it will be much more satisfying
in the equation $\displaystyle a\cos(bx+c)+d$
the amplitude is
$\displaystyle |a|$
the period is $\displaystyle \frac{2\pi}{|b|}$
the phase shift is
$\displaystyle \frac{-c}{d}$
and the d is a vertical shift up or down