Encyclopedia > List of integrals of irrational functions

Article Content

List of integrals of irrational functions

The following is a list of Integrals (Antiderivative functions) of irrational functions[?]. For a complete list of Integral functions, please see Table of Integrals and List of integrals.

<math>\int\sqrt{a^2-x^2}dx = \frac{1}{2}\left(x\sqrt{a^2-x^2}+a^2\arcsin\frac{x}{a}\right) \qquad\mbox{(}|x|\leq|a|\mbox{)}</math>

<math>\int x\sqrt{a^2-x^2}dx = -\frac{1}{3}\sqrt{(a^2-x^2)^3} \qquad\mbox{(}|x|\leq|a|\mbox{)}</math>

<math>\int\frac{\sqrt{a^2-x^2}dx}{x} = \sqrt{a^2-x^2}-a\ln\left|\frac{a+\sqrt{a^2+x^2}}{x}\right| \qquad\mbox{(}|x|\leq|a|\mbox{)}</math>

<math>\int\frac{dx}{\sqrt{a^2-x^2}} = \arcsin\frac{x}{a} \qquad\mbox{(}|x|\leq|a|\mbox{)}</math>

<math>\int\frac{x^2dx}{\sqrt{a^2-x^2}} = -\frac{x}{2}\sqrt{a^2-x^2}+\frac{a^2}{2}\arcsin\frac{x}{a} \qquad\mbox{(}|x|\leq|a|\mbox{)}</math>

<math>\int\sqrt{x^2+a^2}dx = \frac{1}{2}\left(x\sqrt{x^2+a^2}+a^2\,\mathrm{arsinh}\frac{x}{a}\right)</math>

<math>\int\frac{\sqrt{x^2+a^2}dx}{x} = \sqrt{x^2+a^2}-a\ln\left|\frac{a+\sqrt{x^2+a^2}}{x}\right|</math>

<math>\int\frac{dx}{\sqrt{x^2+a^2}} = \mathrm{arsinh}\frac{x}{a} = \ln\left|x+\sqrt{x^2+a^2}\right|</math>

<math>\int\frac{x^2\;dx}{\sqrt{x^2+a^2}} = \frac{x}{2}\sqrt{x^2+a^2}-\frac{a^2}{2}\,\mathrm{arsinh}\frac{x}{a} = \frac{x}{2}\sqrt{x^2+a^2}-\frac{a^2}{2}\ln\left|x+\sqrt{x^2+a^2}\right|</math>

<math>\int\frac{dx}{x\sqrt{x^2+a^2}} = -\frac{1}{a}\,\mathrm{arsinh}\frac{a}{x} = -\frac{1}{a}\ln\left|\frac{a+\sqrt{x^2+a^2}}{x}\right|</math>

<math>\int\sqrt{x^2-a^2}dx = \frac{1}{2}\left(x\sqrt{x^2-a^2}\mp a^2\,\mathrm{arcosh}\left|\frac{x}{a}\right|\right) \qquad\mbox{(for }|x|\ge\|a|\mbox{; }-\mbox{ for }x>0\mbox{, }+\mbox{ for }x<0\mbox{)}</math>

<math>\int x\sqrt{x^2-a^2}dx = \frac{1}{3}\sqrt{(x^2-a^2)^3} \qquad\mbox{(for }|x|\ge|a|\mbox{)}</math>

<math>\int\frac{\sqrt{x^2-a^2}dx}{x} = \sqrt{x^2-a^2} - a\arccos\frac{a}{x} \qquad\mbox{(for }|x|\ge|a|\mbox{)}</math>

<math>\int\frac{dx}{\sqrt{x^2-a^2}} = \mathrm{arcosh}\frac{x}{a} = \ln\left(|x|+\sqrt{x^2-a^2}\right) \qquad\mbox{(for }|x|>|a|\mbox{)}</math>

<math>\int\frac{x\;dx}{\sqrt{x^2-a^2}} = \sqrt{x^2-a^2} \qquad\mbox{(for }|x|>|a|\mbox{)}</math>

<math>\int\frac{x^2\;dx}{\sqrt{x^2-a^2}} = \frac{x}{2}\sqrt{x^2-a^2}+\frac{a^2}{2}\,\mathrm{arcosh}\left|\frac{x}{a}\right| = \frac{1}{2}\left(x\sqrt{x^2-a^2}+a^2\ln\left(|x|+\sqrt{x^2-a^2}\right)\right) \qquad\mbox{(for }|x|>|a|\mbox{)}</math>

<math>\int\frac{dx}{\sqrt{ax^2+bx+c}} = \frac{1}{\sqrt{a}}\ln\left|2\sqrt{a(ax^2+bx+c)}+2ax+b\right| \qquad\mbox{(for }a>0\mbox{)}</math>

<math>\int\frac{dx}{\sqrt{ax^2+bx+c}} = \frac{1}{\sqrt{a}}\,\mathrm{arsinh}\frac{2ax+b}{\sqrt{4ac-b^2}} \qquad\mbox{(for }a>0\mbox{, }4ac-b^2>0\mbox{)}</math>

<math>\int\frac{dx}{\sqrt{ax^2+bx+c}} = \frac{1}{\sqrt{a}}\ln|2ax+b| \qquad\mbox{(for }a>0\mbox{, }4ac-b^2=0\mbox{)}</math>

<math>\int\frac{dx}{\sqrt{ax^2+bx+c}} = -\frac{1}{\sqrt{-a}}\arcsin\frac{2ax+b}{\sqrt{b^2-4ac}} \qquad\mbox{(for }a<0\mbox{, }4ac-b^2<0\mbox{)}</math>

All Wikipedia text is available under the terms of the GNU Free Documentation License

Search Encyclopedia

Search over one million articles, find something about almost anything!