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Question

The value of the definite integral π0πtanxsecx+tanxdx is equal to

A
π(1π)
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B
π(π2)
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C
π(2π)
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D
π(π1)
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Solution

The correct option is B π(π2)
tanxsecx+tanx=tanx(secxtanx)
Let I=π0πtanxsecx+tanxdx
I=π0π(secxtanxtan2x)dx
=π0π(secxtanx+1sec2x)dx
=π[secx+xtanx]π0
=π(π2)

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