#### Answer

.15

#### Work Step by Step

We are asked to use a calculator to evaluate each of the following expressions. Thus, as the book mentions on pages 480 and 481, it is important to note that $arcsin$ is the same as $sin^{-1}$, $arccos$ is the same as $cos^{-1}$, and $arctan$ is the same as $tan^{-1}$. Knowing this, we plug the value into the calculator to find the answer is:
$$.15$$