Answer
$\theta = 45^{\circ}, 225^{\circ}$
Work Step by Step
$sin(\theta) = \frac{y}{r}$
$cos(\theta) = \frac{x}{r}$
If $sin(\theta) = cos(\theta)$, then $x = y$
If $x = y$, then $\theta = 45^{\circ}$ or $\theta = 225^{\circ}$
Trigonometry (10th Edition)
by Lial, Margaret L.; Hornsby, John; Schneider, David I.; Daniels, Callie
Published by
Pearson
ISBN 10:
0321671775
ISBN 13:
978-0-32167-177-6
Chapter 2 - Acute Angles and Right Triangles - Section 2.2 Trigonometric Functions of Non-Acute Angles - 2.2 Exercises - Page 60: 77
Update this answer!
You can help us out by revising, improving and updating this answer.
Update this answerAfter 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.
