First slide

Evaluation of definite integrals

Question

$\int_{π}^{10 π} |sinx| dx =$

NA

A

18
B

28
C

25
D

30

Solution

$\begin{array}{l} \int_{π}^{10 π} | \sin x | d x = 9 \int_{0}^{π} | \sin x | d x \\ 9 \int_{0}^{π} \sin x d x = 18 \end{array}$

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