Graph the Expression on Each Side of the Equals Symbol $$\sqrt { \frac { 1 + \cos 26 ^ { \circ } } { 2 } }$$

Multiple Choice

Graph the expression on each side of the equals symbol to determine whether the equation might be an identity.
- $$\sqrt { \frac { 1 + \cos 26 ^ { \circ } } { 2 } }$$

A) $\sin 13 ^ { \circ }$
B) $\cot 13 ^ { \circ }$
C) $\tan 13 ^ { \circ }$
D) $\cos 13$