## Precalculus: Concepts Through Functions, A Unit Circle Approach to Trigonometry (3rd Edition)

Published by Pearson

# Chapter 7 - Applications of Trigonometric Functions - Section 7.1 Right Triangle Trigonometry ; Applications - 7.1 Assess Your Understanding - Page 539: 3

#### Answer

$\theta=30°$

#### Work Step by Step

Since $\theta$ is an acute angle then $0°< \theta<90°$. We know that, $sin\theta=\frac{1}{2}$, this means that we use the inverse sine function and a calculator in degree mode to obtain: $\theta=\sin^{-1}(\frac{1}{2})=30°$

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