Trigonometry (10th Edition)

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

Chapter 1 - Trigonometric Functions - Section 1.3 Trigonometric Functions - 1.3 Exercises: 103


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 $\sin10^{\circ}=cos80^{\circ}\approx0.1736$ $\sin53^{\circ}=cos37^{\circ}\approx0.7986$
Update this answer!

You can help us out by revising, improving and updating this answer.

Update this answer

After 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.