If \( \int_{a}^{b}|\sin x| d x=8 \& \int_{0}^{a+b}|\cos x| d x=9 \) then; (a) \( a+b=9 \pi \) (b...

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If \( \int_{a}^{b}|\sin x| d x=8 \& \int_{0}^{a+b}|\cos x| d x=9 \) then;
(a) \( a+b=9 \pi \)
(b) \( b-a=4 \pi \)
(c) \( \int_{a}^{b} x \sin x d x=2 \sqrt{2} \pi \)
(d) \( \int_{a}^{b} x \sin x d x=\sqrt{2} \pi \)
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