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Beliebt Rechnen >

integral of (cos(3x))(1sin(3x)-1)

Lösung

\int (cos (3 x)) (1 sin (3 x) - 1) d x

Lösung

- \frac{1}{6} cos^{2} (3 x) - \frac{1}{3} sin (3 x) + C

Schritte zur Lösung

\int cos (3 x) (1 \cdot sin (3 x) - 1) d x

Multipliziere aus

cos (3 x) (1 \cdot sin (3 x) - 1) : cos (3 x) sin (3 x) - cos (3 x)

= \int cos (3 x) sin (3 x) - cos (3 x) d x

Wende die Summenregel an:

\int f (x) \pm g (x) d x = \int f (x) d x \pm \int g (x) d x

= \int cos (3 x) sin (3 x) d x - \int cos (3 x) d x

\int cos (3 x) sin (3 x) d x = - \frac{1}{6} cos^{2} (3 x)

\int cos (3 x) d x = \frac{1}{3} sin (3 x)

= - \frac{1}{6} cos^{2} (3 x) - \frac{1}{3} sin (3 x)

Füge eine Konstante zur Lösung hinzu

= - \frac{1}{6} cos^{2} (3 x) - \frac{1}{3} sin (3 x) + C

Graph

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