## Functions Modeling Change: A Preparation for Calculus, 5th Edition

$$\cos \left(x\right)$$
Simplifying the expression using the Laws of Trigonometry, we find: $$\frac{\frac{\cos \left(x\right)}{\sin \left(x\right)}}{\frac{1}{\sin \left(x\right)}} \\ \frac{\cos \left(x\right)\sin \left(x\right)}{\sin \left(x\right)} \\ \cos \left(x\right)$$