$$ \int\limits_{0}^{20 \pi}(|\sin x|+|\cos x|)^{2} d x \text { is equal to } $$ - DASH

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Question

$$ \int\limits_{0}^{20 \pi}(|\sin x|+|\cos x|)^{2} d x \text { is equal to } $$

$10(\pi+4)$

$10(\pi+2)$

$20(\pi-2)$

$20(\pi+2)$

Solution

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