## Trigonometry (11th Edition) Clone

$h=r\cos\theta$
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 $h$: $h=r\cos\theta$