Find the exact value of the expression. Do not use a calculator.
-$\cos \left[ \cos ^ { - 1 } ( - 0.9372 ) \right]$
A) -0.4686
B) -0.9372
C) 0.9372
D) 0.4686

Question

Quizplus · Accepted Answer

The expression $\cos \left[ \cos ^ { - 1 } ( - 0.9372 ) \right]$ simplifies directly to -0.9372, because $\cos ^ { - 1 } ( - 0.9372 )$ is the angle whose cosine is -0.9372, and taking the cosine of this angle gives back -0.9372.

Find the Exact Value of the Expression cos⁡[cos⁡−1(−0.9372)]\cos \left[ \cos ^ { - 1 } ( - 0.9372 ) \right]cos[cos−1(−0.9372)]

Find the Exact Value of the Expression $\cos \left[ \cos ^ { - 1 } ( - 0.9372 ) \right]$