Given $a = 12 , b = 5$ , And $c = 15$

Multiple Choice

Given $a = 12 , b = 5$ , and $c = 15$ , use the Law of Cosines to solve the triangle for the value of $C$ . Round answer to two decimal places.

A) $60.34 ^ { \circ }$
B) $117.82 ^ { \circ }$
C) $80.45 ^ { \circ }$
D) $17.15 ^ { \circ }$
E) $45.04 ^ { \circ }$