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Beliebt Rechnen >

integral from 0 to pi/9 of cos(3x)

Lösung

\int_{0}^{\frac{π}{9}} cos (3 x) d x

Lösung

\frac{1}{2 3}

+1

Dezimale

0.28867 \dots

Schritte zur Lösung

\int_{0}^{\frac{π}{9}} cos (3 x) d x

Wende U-Substitution an

= \int_{0}^{\frac{π}{3}} cos (u) \frac{1}{3} d u

Entferne die Konstante:

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

= \frac{1}{3} \cdot \int_{0}^{\frac{π}{3}} cos (u) d u

Nutze das gemeinsame Integral :

\int cos (u) d u = sin (u)

= \frac{1}{3} [sin (u)]_{0}^{\frac{π}{3}}

Berechne die Grenzen:

\frac{3}{2}

= \frac{1}{3} \cdot \frac{3}{2}

Vereinfache

= \frac{1}{2 3}

Graph

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