Trigonometry (10th Edition)

Published by Pearson
ISBN 10: 0321671775
ISBN 13: 978-0-32167-177-6

Chapter 2 - Review Exercises - Page 89: 39

Answer

false

Work Step by Step

Our calculator, set to DEGREES, gives $\sin 50^{o}+\sin 40^{o}\approx$1.40883205281 and $\sin 90^{\mathrm{o}}=1$, LHS$\neq$RHS the statement is false.
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