Answer
True.
It is because $cos~60°=sin~30°$
Work Step by Step
$cos~60°-sin~30°=\frac{1}{2}-\frac{1}{2}=0$
Also, remember that $sin(90°-θ)=cos~θ$. So:
$sin~30°=sin(90°-60°)=cos~60°$
Algebra and Trigonometry 10th Edition
by Larson, Ron
Published by
Cengage Learning
ISBN 10:
9781337271172
ISBN 13:
978-1-33727-117-2
Chapter 6 - 6.2 - Right Triangle Trigonometry - 6.2 Exercises - Page 444: 76
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