integral of (sin(x))^3(cos(x))^3

Lösung

\int (sin (x))^{3} (cos (x))^{3} d x

- \frac{cos ^{4} ( x )}{4} + \frac{cos ^{6} ( x )}{6} + C

Schritte zur Lösung

\int (sin (x))^{3} (cos (x))^{3} d x

Vereinfache

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

Umschreiben mit Hilfe von Trigonometrie-Identitäten

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

Wende U-Substitution an

= \int - u^{3} (1 - u^{2}) d u

Multipliziere aus

- u^{3} (1 - u^{2}) : - u^{3} + u^{5}

= \int - u^{3} + u^{5} 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 u^{3} d u + \int u^{5} d u

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

\int u^{5} d u = \frac{u ^{6}}{6}

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

Setze in

u = cos (x)

ein

= - \frac{cos ^{4} ( x )}{4} + \frac{cos ^{6} ( x )}{6}

Füge eine Konstante zur Lösung hinzu

= - \frac{cos ^{4} ( x )}{4} + \frac{cos ^{6} ( x )}{6} + C

d er i v a t i v e e^{a r c s i n (x)}

\frac{d y}{d x} = - \frac{1}{2 y}

\int_{- 1}^{1} - 2 y^{2} + 2 d y

y^{^{''}} + 18 y^{^{'}} + 80 y = 0

\int_{0}^{1} \frac{25}{x ^{5}} d x