Use the Fundamental Identities to Find the Value of the Trigonometric

Multiple Choice

Use the fundamental identities to find the value of the trigonometric function.
-Lines m and n are parallel.
$a = ( 2 x + 9 ) ^ { \circ }$
$b = ( 3 x - 14 ) ^ { \circ }$

A) $67 ^ { \circ } , 67 ^ { \circ }$
B) $23 ^ { \circ } , 23 ^ { \circ }$
C) $55 ^ { \circ } , 55 ^ { \circ }$
D) $- 37 ^ { \circ } , - 37 ^ { \circ }$