Answer
Amplitude is 1
period is $\pi$
Horizontal shift is $\frac{\pi}{2}$
Work Step by Step
The equation is already converted to the following form $y=a\cdot $cos$(k(x-b))$, so one can find the data. The amplitude is $|a|$ which is 1 in this example. The period is found using $\frac{2\pi}{k}$, so $\frac{2\pi}{2}=\pi$. And the horizontal shift is represented by $b$, which, in this case, is $\frac{\pi}{2}$.
