Write the function in terms of its cofunction. Assume that any angle in which an unknown appears is an acute angle.
-$\sin 27 ^ { \circ }$
A) $\cos 63 ^ { \circ }$
B) $\cos 27 ^ { \circ }$
C) $\csc 63 ^ { \circ }$
D) $\sin 117 ^ { \circ }$

Question

Quizplus · Accepted Answer

The cofunction identity for sine and cosine is $\sin(\theta) = \cos(90^\circ - \theta)$. Therefore, $\sin(27^\circ) = \cos(63^\circ)$.

Write the Function in Terms of Its Cofunction sin⁡27∘\sin 27 ^ { \circ }sin27∘

Write the Function in Terms of Its Cofunction $\sin 27 ^ { \circ }$