## Algebra 2 (1st Edition)

Published by McDougal Littell

# Chapter 13, Trigonometric Ratios and Functions - 13.4 Evaluate Inverse Trigonometric Functions - 13.4 Exercises - Quiz for Lessons 13.3-13.4 - Page 880: 12

#### Answer

$60^{\circ}$ or, $\dfrac{\pi}{3}$

#### Work Step by Step

Here, we have $\cos^{-1} (\dfrac{1}{2})$ This means that $\theta=\cos^{-1} (\dfrac{1}{2})$ This gives : $\theta=60^{\circ}$ The range of the function $arccos$ is from $[0, 180^{\circ}]$. Hence, we have $\theta=60^{\circ}$ or, $\dfrac{\pi}{3}$

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.