integral of cos(x)(1+sin^2(x))

Lösung

\int cos (x) (1 + sin^{2} (x)) d x

sin (x) + \frac{sin ^{3} ( x )}{3} + C

Schritte zur Lösung

\int cos (x) (1 + sin^{2} (x)) d x

Wende U-Substitution an

= \int 1 + u^{2} d u

Wende die Summenregel an:

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

= \int 1 d u + \int u^{2} d u

\int 1 d u = u

\int u^{2} d u = \frac{u ^{3}}{3}

= u + \frac{u ^{3}}{3}

Setze in

u = sin (x)

ein

= sin (x) + \frac{sin ^{3} ( x )}{3}

Füge eine Konstante zur Lösung hinzu

= sin (x) + \frac{sin ^{3} ( x )}{3} + C

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