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Beliebt Rechnen >

integral from 0 to pi/2 of 28x^2sin(x)

Lösung

\int_{0}^{\frac{π}{2}} 28 x^{2} sin (x) d x

Lösung

28 (π - 2)

+1

Dezimale

31.96459 \dots

Schritte zur Lösung

\int_{0}^{\frac{π}{2}} 28 x^{2} sin (x) d x

Entferne die Konstante:

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

= 28 \cdot \int_{0}^{\frac{π}{2}} x^{2} sin (x) d x

Wende die partielle Integration an

= 28 [- x^{2} cos (x) - \int - 2 x cos (x) d x]_{0}^{\frac{π}{2}}

\int - 2 x cos (x) d x = - 2 (x sin (x) + cos (x))

= 28 [- x^{2} cos (x) - (- 2 (x sin (x) + cos (x)))]_{0}^{\frac{π}{2}}

Vereinfache

= 28 [- x^{2} cos (x) + 2 (x sin (x) + cos (x))]_{0}^{\frac{π}{2}}

Berechne die Grenzen:

π - 2

= 28 (π - 2)

Graph

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