alleryStart learning →Using the replacement x -> pi/2 - x, the integral of sin x/(sin x + cos x) over [0, pi/2] equals
Api/2
Bpi/3
Cpi/4
Dpi/6
Answer & Solution
Correct answer: C. pi/4
Replacing x by pi/2 - x gives the companion integral, and the two add up to pi/2, so each equals pi/4.
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