integral of cos(x)(6+4sin^2(x))

Lösung

\int cos (x) (6 + 4 sin^{2} (x)) d x

6 sin (x) + \frac{4 sin ^{3} ( x )}{3} + C

Schritte zur Lösung

\int cos (x) (6 + 4 sin^{2} (x)) d x

Wende U-Substitution an

= \int 6 + 4 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 6 d u + \int 4 u^{2} d u

\int 6 d u = 6 u

\int 4 u^{2} d u = \frac{4 u ^{3}}{3}

= 6 u + \frac{4 u ^{3}}{3}

Setze in

u = sin (x)

ein

= 6 sin (x) + \frac{4 sin ^{3} ( x )}{3}

Füge eine Konstante zur Lösung hinzu

= 6 sin (x) + \frac{4 sin ^{3} ( x )}{3} + C

x \to 2 lim (3 - x^{2})

y^{^{'}} = y sin (2 x)

x \to \infty lim (x (arctan (x) - \frac{π}{2}))

d er i v a t i v e f (x) = (7 x^{6} + 8 x^{3})^{4}

4 y^{^{''}} - 4 y^{^{'}} - 3 y = 0, y (0) = 1, y^{^{'}} (0) = 5