## Trigonometry (11th Edition) Clone

Published by Pearson

# Chapter 3 - Radian Measure and the Unit Circle - Section 3.2 Applications of Radian Measure - 3.2 Exercises - Page 115: 74

#### Answer

$h=r\cos\theta$

#### Work Step by Step

In a right angled triangle, $\cos\theta=\frac{base}{hypotenuse}$ Since $r=hypotenuse$ and $h=base$, the formula becomes: $\cos\theta=\frac{base}{hypotenuse}=\frac{h}{r}$ Solving for $h$: $h=r\cos\theta$

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