integral of 8csc^4(x)cot^6(x)

Lösung

\int 8 csc^{4} (x) cot^{6} (x) d x

- 8 (\frac{1}{7} cot^{7} (x) + \frac{1}{9} cot^{9} (x)) + C

Schritte zur Lösung

\int 8 csc^{4} (x) cot^{6} (x) d x

Entferne die Konstante:

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

= 8 \cdot \int csc^{4} (x) cot^{6} (x) d x

Wende U-Substitution an

= 8 \cdot \int - u^{6} (1 + u^{2}) d u

Entferne die Konstante:

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

= 8 (- \int u^{6} (1 + u^{2}) d u)

Multipliziere aus

u^{6} (1 + u^{2}) : u^{6} + u^{8}

= 8 (- \int u^{6} + u^{8} 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

= 8 (- (\int u^{6} d u + \int u^{8} d u))

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

\int u^{8} d u = \frac{u ^{9}}{9}

= 8 (- (\frac{u ^{7}}{7} + \frac{u ^{9}}{9}))

Setze in

u = cot (x)

ein

= 8 (- (\frac{cot ^{7} ( x )}{7} + \frac{cot ^{9} ( x )}{9}))

Vereinfache

8 (- (\frac{cot ^{7} ( x )}{7} + \frac{cot ^{9} ( x )}{9})) : - 8 (\frac{1}{7} cot^{7} (x) + \frac{1}{9} cot^{9} (x))

= - 8 (\frac{1}{7} cot^{7} (x) + \frac{1}{9} cot^{9} (x))

Füge eine Konstante zur Lösung hinzu

= - 8 (\frac{1}{7} cot^{7} (x) + \frac{1}{9} cot^{9} (x)) + C

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