Derivative of Cotangent Function/Corollary 2

Corollary to Derivative of Cotangent Function

 * $\map {\dfrac \d {\d x} } {\cot a x} = -a \paren {\cot^2 a x + 1}$

Also see

 * Derivative of $\sin a x$
 * Derivative of $\cos a x$


 * Derivative of $\tan a x$


 * Derivative of $\sec a x$
 * Derivative of $\csc a x$