Calculus/Tables of Integrals

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Contents

[edit] Rules

  • \int cf(x)\,dx = c\int f(x)\,dx
  • \int f(x)+g(x)\,dx = \int f(x)\,dx+ \int g(x)\,dx
  • \int f(x)-g(x)\,dx = \int f(x)\,dx- \int g(x)\,dx
  • \int u\,dv\ = uv - \int v\,du

[edit] Powers

  • \int dx = x+C
  • \int a\,dx = ax+C
  • \int x^n\,dx = \frac{1}{n+1}x^{n+1}+C\qquad\mbox{ if }n\ne-1
  • \int x^{-n}\,dx = \frac{1}{-n+1}x^{-n+1}+C\qquad\mbox{ if }n\ne1
  • \int {1\over x}\,dx = \ln|x|+C
  • \int \frac{1}{ax+b}\,dx = {1 \over a}\ln|ax+b|+C\qquad\mbox{ if }a\ne 0

[edit] Trigonometric Functions

[edit] Basic Trigonometric Functions

  • \int \sin{x}\,dx = -\cos{x} + C
  • \int \cos{x}\,dx = \sin{x} + C
  • \int \tan{x}\,dx = \ln \left |{\sec{x}} \right | + C
  • \int \sin^2{x}\,dx = \frac{1}{2} x - \frac{1}{4} \sin{2x} + C
  • \int \cos^2{x}\,dx = \frac{1}{2} x + \frac{1}{4} \sin{2x} + C
  • \int \tan^2{x}\,dx = \tan(x) - x + C

[edit] Reciprocal Trigonometric Functions

  • \int \sec{x}\,dx = \ln \left |{\sec{x}}+\tan x \right | + C = \ln \left | \tan{\left( \frac1 2 x +\frac1 4 \pi \right) }\right |+C
  • \int \csc{x}\,dx = - \ln \left |{\csc x + \cot x} \right | + C=\ln \left | \tan \left(\frac1 2 x \right) \right |+C
  • \int \cot{x}\,dx = \ln \left |{\sin{x}} \right | + C


  • \int \sec^2 kx\,dx = \frac1 k \tan{kx} + C
  • \int \csc^2 kx\,dx = -\frac1 k \cot kx + C
  • \int \cot^2 kx\,dx = -x-\frac1 k \cot kx + C


  • \int \sec{x}\tan{x}\,dx = \sec x + C
  • \int \csc^n kx \cot kx\,dx = -\frac{1}{ka} \csc^n ax + C
  • \int \sec x \csc x\,dx =\ln \left | \tan x \right | + C

[edit] Inverse Trigonometric Functions

  • \int {1\over \sqrt{1-x^2}}\,dx = \mbox{arcsin}(x) + C
  • \int {1\over \sqrt{a^2-x^2}}\,dx = \mbox{arcsin}(x/a) + C \qquad\mbox{ if }a\ne 0
  • \int {1\over 1+x^2}\,dx = \mbox{arctan}(x) + C
  • \int {1\over a^2+x^2}\,dx = {1\over a}\mbox{arctan}(x/a) + C \qquad\mbox{ if }a\ne 0

[edit] Exponential and Logarithmic Functions

  • \int e^x \,dx = e^x + C
  • \int e^{ax} \,dx = {1\over a}e^{ax} + C \qquad\mbox{ if }a\neq 0
  • \int a^x \,dx = {1\over \ln a}a^x + C \qquad\mbox{ if }a>0, a\neq 1
  • \int \ln x \,dx = x\ln x-x + C

[edit] Inverse Trigonometric Functions

  • \int \mbox{arcsin}(x) \,dx = x\,\mbox{arcsin}(x) + \sqrt{1-x^2} + C
  • \int \mbox{arccos}(x) \,dx = x\,\mbox{arccos}(x) - \sqrt{1-x^2} + C
  • \int \mbox{arctan}(x) \,dx = x\,\mbox{arctan}(x) - {1\over 2}\ln(1+x^2) + C

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