Answer
$36.9$
Work Step by Step
In this exercise, we are asked to find the measure of an unknown angle, given its cosine.
cos $x$ = $\frac{12}{15}$
Take cos$^{-1}$ of each side to solve for $x$:
$x$ = cos$^{-1}$$(\frac{12}{15})$
Evaluate to solve for $x$:
$x \approx 36.9$
