Write the function in terms of its cofunction. Assume that any angle in which an unknown appears is an acute angle.
-$\cot 70.5 ^ { \circ }$
A) $\cot 19.5 ^ { \circ }$
B) $\tan 19.5 ^ { \circ }$
C) $\tan 70.5 ^ { \circ }$
D) $\tan 109.5 ^ { \circ }$

Question

Quizplus · Accepted Answer

The cofunction identity for cotangent and tangent is $\cot(\theta) = \tan(90^\circ - \theta)$. Therefore, $\cot(70.5^\circ) = \tan(90^\circ - 70.5^\circ) = \tan(19.5^\circ)$.

Write the Function in Terms of Its Cofunction cot⁡70.5∘\cot 70.5 ^ { \circ }cot70.5∘

Write the Function in Terms of Its Cofunction $\cot 70.5 ^ { \circ }$