## Trigonometry 7th Edition

$\cot\theta$ = $\frac{\sqrt (1-\sin^{2}\theta)}{\sin\theta}$
From ratio identity- $\cot\theta$ = $\frac{\cos\theta}{\sin\theta}$ $\cot\theta$ = $\frac{\sqrt (1-\sin^{2}\theta)}{\sin\theta}$ [From Pythagorean identity, $\cos\theta$ can be written as $\sqrt (1-\sin^{2}\theta)$]