Q.
∫−ππ2x(1+sinx)1+cos2xdx=
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a
π24
b
π2
c
0
d
π2
answer is B.
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Detailed Solution
I=∫−ππ2xsinxdx1+cos2x dropping odd term I=4∫0πxsinx1+cos2xdx,x→π−x I=4∫0π(π−x)sinx1+cos2xdx 2I=4π∫0πsinx1+cos2xdx=8π∫0π2sinx1+cos2xdx =8πtan−1(−cosx)|0π2=8π(0+π4) =2π2→I=π2
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