# Integral Formula

Integration can be considered as the reverse process as Differentiation or can be called Inverse Differentiation. Integration is the process of finding a function with its derivative.

Integration is the basic operation of Integral Calculus. Integral formulas are classified based on,

• Integral formulas based on Rational functions
• Integral formulas based on Irrational functions
• Integral formulas based on Trigonometric functions
• Integral formulas based on Inverse trigonometric functions
• Integral formulas based on Hyperbolic functions
• Integral formulas based on Inverse hyperbolic functions
• Integral formulas based on Exponential functions
• Integral formulas based on Logarithmic functions
• Integral formulas based on Gaussian functions

Below is the list of Integral Formulas based on the above functions,

$\large \int 1 \; dx = x + C$

$\large \int a \; dx = ax + C$

$\large \int x^{n} \; dx = \frac{x^{n+1}}{n+1} + C; \; n \neq -1$

$\large \int \sin x \; dx = – \cos x + C$

$\large \int \cos x \; dx = \sin x + C$

$\large \int \sec ^{2} x \; dx = \tan x + C$

$\large \int \csc ^{2} x \; dx = -\cot x + C$

$\large \int \sec x (\tan x) \; dx = \sec x + C$

$\large \int \csc x (\cot x) \; dx = – \csc x + C$

$\large \int \frac{1}{x} \; dx = \ln |x| + C$

$\large \int e^{x} \; dx = e^{x} + C$

$\large \int a^{x} \; dx = \frac{a^{x}}{\ln a} + C; \; a> 0, a\neq 1$

$\large \int \frac{1}{\sqrt{1-x^{2}}} \; dx = \sin^{-1} x + C$

$\large \int \frac{1}{\sqrt{1+x^{2}}} \; dx = \tan^{-1} x + C$

$\large \int \frac{1}{|x|\sqrt{x^{2}-1}} \; dx = \sec^{-1} x + C$

$\large \int \sin^{n} (x) dx = \frac{-1}{n} \sin^{n-1} (x) \cos (x) +\frac{n-1}{n} \int \sin^{n-2} (x) dx$

$\large \int \cos^{n} (x) dx = \frac{1}{n} \cos^{n-1} (x) \sin (x) +\frac{n-1}{n} \int \cos^{n-2} (x) dx$

$\large \int \tan^{n} (x) dx = \frac{1}{n-1} \tan^{n-1} (x) +\int \tan^{n-2} (x) dx$

$\large \int \sec^{n} (x) dx = \frac{1}{n-1} \sec^{n-2} (x) \tan (x) + \frac{n-2}{n-1} \int \sec^{n-2} (x) dx$

$\large \int \csc^{n} (x) dx = \frac{-1}{n-1} \csc^{n-2} (x) \cot (x) + \frac{n-2}{n-1} \int \csc^{n-2} (x) dx$

 More topics in Integral Formulas Integration by Parts Formula Definite Integral Formula Area under the Curve Formula U Substitution Formula Integration by Substitution Formula