integral of cot^5(x)*csc^3(x)

Lösung

\int cot^{5} (x) \cdot csc^{3} (x) d x

- \frac{1}{7} csc^{7} (x) + \frac{2}{5} csc^{5} (x) - \frac{1}{3} csc^{3} (x) + C

Schritte zur Lösung

\int cot^{5} (x) csc^{3} (x) d x

Wende U-Substitution an

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

Entferne die Konstante:

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

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

Multipliziere aus

u^{2} (u^{2} - 1)^{2} : u^{6} - 2 u^{4} + u^{2}

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

\int u^{6} d u = \frac{u ^{7}}{7}

\int 2 u^{4} d u = \frac{2 u ^{5}}{5}

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

= - (\frac{u ^{7}}{7} - \frac{2 u ^{5}}{5} + \frac{u ^{3}}{3})

Setze in

u = csc (x)

ein

= - (\frac{csc ^{7} ( x )}{7} - \frac{2 csc ^{5} ( x )}{5} + \frac{csc ^{3} ( x )}{3})

Vereinfache

- (\frac{csc ^{7} ( x )}{7} - \frac{2 csc ^{5} ( x )}{5} + \frac{csc ^{3} ( x )}{3}) : - \frac{1}{7} csc^{7} (x) + \frac{2}{5} csc^{5} (x) - \frac{1}{3} csc^{3} (x)

= - \frac{1}{7} csc^{7} (x) + \frac{2}{5} csc^{5} (x) - \frac{1}{3} csc^{3} (x)

Füge eine Konstante zur Lösung hinzu

= - \frac{1}{7} csc^{7} (x) + \frac{2}{5} csc^{5} (x) - \frac{1}{3} csc^{3} (x) + C

8 \frac{d ^{2} y}{d x ^{2}} + 3 \frac{d y}{d x} + 9 y = 0

n = 0 \sum \infty ln (1 + \frac{1}{n})

y^{^{''}} - 10 y^{^{'}} + 34 y = 0, y (0) = 2, y^{^{'}} (0) = 3

s l o p e in t erce pt (- 3, - 1), (- 2, - 2)

\int \frac{1}{5 x} d x