カテゴリー: 三角関数

x tan(x)とx tanh(x)の積分

\[ \int x\tan^{\pm1}\left(x\right)=\left(i\right)^{\pm1}\left(\frac{x^{2}}{2}-ixLi_{1}\left(\mp e^{2ix}\right)+\frac{1}{2}Li_{2}\left(\mp e^{2ix}\right)\right) \]