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人気のある微分積分 >

integral from-pi/3 to 0 of 3sec^3(x)

解

\int_{- \frac{π}{3}}^{0} 3 sec^{3} (x) d x

解

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

+1

十進法表記

7.17158 \dots

解答ステップ

\int_{- \frac{π}{3}}^{0} 3 sec^{3} (x) d x

定数を除く:

\int a \cdot f (x) d x = a \cdot \int f (x) d x

= 3 \cdot \int_{- \frac{π}{3}}^{0} sec^{3} (x) d x

積分換算を適用する

= 3 ([\frac{sec ^{2} ( x ) sin ( x )}{2}]_{- \frac{π}{3}}^{0} + \frac{1}{2} \cdot \int_{- \frac{π}{3}}^{0} sec (x) d x)

\int_{- \frac{π}{3}}^{0} sec (x) d x = - ln (2 - 3)

= 3 ([\frac{sec ^{2} ( x ) sin ( x )}{2}]_{- \frac{π}{3}}^{0} + \frac{1}{2} (- ln (2 - 3)))

簡素化

3 ([\frac{sec ^{2} ( x ) sin ( x )}{2}]_{- \frac{π}{3}}^{0} + \frac{1}{2} (- ln (2 - 3))) : 3 ([\frac{1}{2} sec (x) tan (x)]_{- \frac{π}{3}}^{0} - \frac{1}{2} ln (2 - 3))

= 3 ([\frac{1}{2} sec (x) tan (x)]_{- \frac{π}{3}}^{0} - \frac{1}{2} ln (2 - 3))

限度を計算する:

3

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

グラフ

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