## Algebra 2 (1st Edition)

Published by McDougal Littell

# Chapter 13, Trigonometric Ratios and Functions - 13.4 Evaluate Inverse Trigonometric Functions - 13.4 Exercises - Skill Practice - Page 878: 5

#### Answer

$\theta=\dfrac{\pi}{2}$ or $90^{\circ}$

#### Work Step by Step

We are given $\cos^{-1} (0)$ We know that the trigonometric function $\cos^{-1}$ has domain $[-1,1]$ and the range is: $[0, \pi]$. So, $\theta = \cos^{-1} (0)$ This implies that: $\theta=\dfrac{\pi}{2}$ or $90^{\circ}$

After you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.