Chapter 7 - Trigonometry and Periodic Functions - Review Exercises and Problems for Chapter Seven - Page 316: 40

period = $2\pi$ amplitude = $1$ midline = $y=3$

Equate this equation to the formula $$y=A\cos(B(t-h))+k$$ where $|A|$ is the amplitude, $2\pi/|B|$ is the period, and the midline is $y=k$. Using this form for the equation gives amplitude equal to $|1|=1$, period equal to $2\pi/1=2\pi$, and midline $y=3$.