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人気のある微分積分 >

integral from pi/8 to pi/2 of cot^3(x)

解

\int_{\frac{π}{8}}^{\frac{π}{2}} cot^{3} (x) d x

解

- ln (2) + \frac{3 + 2 2 + ln ( 2 - 2 )}{2}

+1

十進法表記

1.95366 \dots

解答ステップ

\int_{\frac{π}{8}}^{\frac{π}{2}} cot^{3} (x) d x

積分換算を適用する

= - [\frac{cot ^{2} ( x )}{2}]_{\frac{π}{8}}^{\frac{π}{2}} - \int_{\frac{π}{8}}^{\frac{π}{2}} cot (x) d x

\int_{\frac{π}{8}}^{\frac{π}{2}} cot (x) d x = - \frac{1}{2} ln (2 - 2) + ln (2)

= - [\frac{cot ^{2} ( x )}{2}]_{\frac{π}{8}}^{\frac{π}{2}} - (- \frac{1}{2} ln (2 - 2) + ln (2))

簡素化

- [\frac{cot ^{2} ( x )}{2}]_{\frac{π}{8}}^{\frac{π}{2}} - (- \frac{1}{2} ln (2 - 2) + ln (2)) : - [\frac{1}{2} cot^{2} (x)]_{\frac{π}{8}}^{\frac{π}{2}} + \frac{1}{2} ln (2 - 2) - ln (2)

= - [\frac{1}{2} cot^{2} (x)]_{\frac{π}{8}}^{\frac{π}{2}} + \frac{1}{2} ln (2 - 2) - ln (2)

限度を計算する:

- \frac{3 + 2 2}{2}

= - (- \frac{3 + 2 2}{2}) + \frac{1}{2} ln (2 - 2) - ln (2)

簡素化

= - ln (2) + \frac{3 + 2 2 + ln ( 2 - 2 )}{2}

グラフ

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