Find the Exact Value $\cos 2 \pi$ A) 1
B) $\frac { \sqrt { 2 } } { 2 }$

Multiple Choice

Find the exact value. Do not use a calculator.
- $\cos 2 \pi$

A) 1
B) $\frac { \sqrt { 2 } } { 2 }$
C) 0
D) undefined