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 $h$:
$h=r\cos\theta$
Trigonometry (11th Edition) Clone
by Lial, Margaret L.; Hornsby, John; Schneider, David I.; Daniels, Callie
Published by
Pearson
ISBN 10:
978-0-13-421743-7
ISBN 13:
978-0-13421-743-7
Chapter 3 - Radian Measure and the Unit Circle - Section 3.2 Applications of Radian Measure - 3.2 Exercises - Page 115: 74
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