# Chapter 13, Trigonometric Ratios and Functions - 13.4 Evaluate Inverse Trigonometric Functions - 13.4 Exercises - Skill Practice - Page 878: 16

$-0.64$ radians and $-36.87^{\circ}$

#### Work Step by Step

In order to get the answer in radians, we need to put the calculator in radians mode. Then, our result will be: $-0.64$ radians In order to get the answer in degrees, we need to put the calculator in degrees mode. Then, our result will be: $-36.87^{\circ}$

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