Trigonometry 7th Edition

Published by Cengage Learning
ISBN 10: 1111826854
ISBN 13: 978-1-11182-685-7

Chapter 4 - Section 4.5 - Finding an Equation from Its Graph - 4.5 Problem Set - Page 244: 47

Answer

$84^\circ$.

Work Step by Step

We need to add $360$ so that it falls between $0$ and $360$, from which we get $84$. Since it is in Q1, its reference angle is $\theta$, which is $84^\circ$.
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