# Integral of Hyperbolic Cosine

The integration of the hyperbolic cosine function is an important integral formula in integral calculus. This integral belongs to the hyperbolic formulae.

The integration of the hyperbolic cosine function is of the form

To prove this formula, consider

Using the derivative formula , we have

Integrating both sides of equation (i) with respect to , we have

As we know that by definition integration is the inverse process of the derivative, so the integral sign and on the right side will cancel each other out, i.e.

**Other Integral Formulae of the Hyperbolic Cosine Function**

The other formulae of the hyperbolic cosine integral with the angle of hyperbolic cosine in the form of a function are:

**1.**

**2.**