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list of integrals of trigonometric functions : ウィキペディア英語版
list of integrals of trigonometric functions

The following is a list of integrals (antiderivative functions) of trigonometric functions. For antiderivatives involving both exponential and trigonometric functions, see List of integrals of exponential functions. For a complete list of antiderivative functions, see Lists of integrals. For the special antiderivatives involving trigonometric functions, see Trigonometric integral.
Generally, if the function \sin(x) is any trigonometric function, and \cos(x) is its derivative,
: \int a\cos nx\;\mathrmx = \frac\sin nx+C
In all formulas the constant ''a'' is assumed to be nonzero, and ''C'' denotes the constant of integration.
== Integrands involving only sine ==

: \int\sin ax\;\mathrmx = -\frac\cos ax+C\,\!


: \int\sin^2 \;\mathrmx = \frac - \frac \sin 2ax +C= \frac - \frac \sin ax\cos ax +C\!


: \int\sin^3 \;\mathrmx = \frac - \frac +C\!
: \int x\sin^2 \;\mathrmx = \frac - \frac \sin 2ax - \frac \cos 2ax +C\!


: \int x^2\sin^2 \;\mathrmx = \frac - \left( \frac - \frac \right) \sin 2ax - \frac \cos 2ax +C\!


: \int\sin b_1x\sin b_2x\;\mathrmx = \frac-\frac+C \qquad\mbox|b_1|\neq|b_2|\mbox\,\!


: \int\sin^n \;\mathrmx = -\frac + \frac\int\sin^ ax\;\mathrmx \qquad\mboxn>0\mbox\,\!


: \int\frac = -\frac\ln\right|}+C


: \int\frac = \frac+\frac\int\frac \qquad\mboxn>1\mbox\,\!


: \int x\sin ax\;\mathrmx = \frac-\frac+C\,\!


: \int x^n\sin ax\;\mathrmx = -\frac\cos ax+\frac\int x^\cos ax\;\mathrmx = \sum_^ (-1)^ \frac}\frac \cos ax +\sum_^(-1)^k \frac}\frac \sin ax \qquad\mboxn>0\mbox\,\!




: \int\frac \mathrmx = \sum_^\infty (-1)^n\frac +C\,\!


: \int\frac \mathrmx = -\frac\int\fracx\,\!


: \int\frac = \frac\tan\left(\frac\mp\frac\right)+C


: \int\frac = \frac\tan\left(\frac - \frac\right)+\frac\ln\left|\cos\left(\frac-\frac\right)\right|+C


: \int\frac = \frac\cot\left(\frac - \frac\right)+\frac\ln\left|\sin\left(\frac-\frac\right)\right|+C


: \int\frac = \pm x+\frac\tan\left(\frac\mp\frac\right)+C

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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