Write the function in terms of its cofunction. Assume that any angle in which an unknown appears is an acute angle.
-tan 41°
A)cot 49°
B)cot 139°
C)tan 131°
D)cot 41°

Question

Quizplus · Accepted Answer

The cofunction of the tangent function is the cotangent function, and the relationship between an angle and its cofunction in a right triangle is that they add up to 90 degrees. Therefore, tan(41°) is equivalent to cot(90°-41°), which is cot(49°).

Write the Function in Terms of Its Cofunction