$\large \dfrac{d}{dx} \, \tan{x} = \sec^2{x}$
It is read as the derivative (or) differentiation of tan of angle $x$ with respect to $x$ is equal to square of secant of angle $x$.
Learn how to derive differentiation of $\tan{x}$ formula in calculus.
Learn how to solve easy to difficult mathematics problems of all topics in various methods with step by step process and also maths questions for practising.