# Chapter 14 - Trigonometric Identities and Equations - 14-1 Trigonometric Identities - Practice and Problem-Solving Exercises - Page 908: 21

$$\sin\theta$$

#### Work Step by Step

Use the Tangent Identity: $$\tan\theta=\frac{\sin\theta}{\cos\theta}$$ To obtain: $$\cos\theta\tan\theta=\cos\theta\bigg(\frac{\sin\theta}{\cos\theta}\bigg)=\sin\theta$$

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.