# Chapter 9 - Trigonometric Identities, Models, and Complex Numbers - 9.2 Identities, Expressions, and Equations - Exercises and Problems for Section 9.2 - Exercises and Problems - Page 363: 17

$$\frac{\cos \left(φ\right)-1}{\sin \left(φ\right)}+\frac{\sin \left(φ\right)}{\cos \left(φ\right)+1}$$

#### Work Step by Step

Simplifying the expression using trigonometric identities, we find: $$\frac{\left(\cos \left(φ\right)-1\right)}{\sin \left(φ\right)}+\frac{\left(\sin \left(φ\right)\right)}{\cos \left(φ\right)+1}=\frac{\cos \left(φ\right)-1}{\sin \left(φ\right)}+\frac{\sin \left(φ\right)}{\cos \left(φ\right)+1} \\ \frac{\cos \left(φ\right)-1}{\sin \left(φ\right)}+\frac{\sin \left(φ\right)}{\cos \left(φ\right)+1}$$

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