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(i) int0^(pi//2) cos x dx (ii) int(-pi//...

(i) `int_0^(pi//2) cos x dx` (ii) `int_(-pi//2)^(pi//2) cos x dx` (iii) `int_0^(pi//2) cos 2x dx`

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The correct Answer is:
(i) 1 (ii) 2 (iii) 0
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