Trigonometry (11th Edition) Clone

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

Chapter 5 - Review Exercises - Page 248: 23


$$\sin75^\circ=\sin15^\circ\cos60^\circ+\cos15^\circ\sin60^\circ$$ 23 is with J.

Work Step by Step

$$\sin75^\circ$$ It is true that $$\sin75^\circ=\sin(15^\circ+60^\circ)$$ This fact points to the use of the sum identity for sine, stating that $$\sin(A+B)=\sin A\cos B+\cos A\sin B$$ Therefore, for $A=15^\circ$ and $B=60^\circ$: $$\sin75^\circ=\sin15^\circ\cos60^\circ+\cos15^\circ\sin60^\circ$$ The equation indicates that 23 should be matched with J.
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.