Trigonometry (11th Edition) Clone

Published by Pearson
ISBN 10: 978-0-13-421743-7
ISBN 13: 978-0-13421-743-7

Chapter 1 - Trigonometric Functions - Section 1.3 Trigonometric Functions - 1.3 Exercises - Page 29: 109


The sine of an angle is equal to the cosine of its complementary angle.

Work Step by Step

1. Set up calculator in degrees $\sin15^{\circ}\approx0.2588$ $\cos75^{\circ}\approx0.2588$ 2. Pick up more examples $\sin10^{\circ}=cos80^{\circ}\approx0.1736$ $\sin53^{\circ}=cos37^{\circ}\approx0.7986$
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