Derivatives of Trigonometric Functions

A reference table of all six trigonometric-function derivatives:

$\begin{array}{ll}y=f(x) & dy/dx=f'(x)\\ \hline \sin x & \cos x\\ \cos x & -\sin x\\ \tan x & \sec^2x\\ \cot x & -\text{cosec}^2x\\ \sec x & \sec x\tan x\\ \text{cosec}\,x & -\text{cosec}\,x\cot x\end{array}$ …