Trigonometry 7th Edition

Published by Cengage Learning
ISBN 10: 1111826854
ISBN 13: 978-1-11182-685-7

Chapter 2 - Section 2.1 - Definition II: Right Triangle Trigonometry - 2.1 Problem Set: 29

Answer

$(90- x)^{\circ}$ $ \sin x^{\circ} = \cos ( 90- x)^{\circ}$

Work Step by Step

$ \sin x^{\circ} = \cos ( 90- x)^{\circ}$ Reason- sine and cosine are cofunctions and $ x^{\circ} + (90-x)^{\circ} = 90^{\circ}$ i.e. $ x^{\circ}$ and $ (90-x)^{\circ}$ are complementary angles.
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.