# Derivative of secx formula

## Formula

$\large \dfrac{d}{dx} \, \sec{x} \,=\, \sec{x}\tan{x}$

It is read as the derivative (or) differentiation of sec of angle $x$ with respect to $x$ is equal to product of secant and tangent functions.

### Proof

Learn how to derive differentiation of $\sec{x}$ formula in calculus.