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Question

π/3π/6dx1+cotx

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Solution

I=π/3π/6dx1+cotx
I=π/3π/6dx1+cot(π2x)=π/3π/6dx1+tanx

2I=π/3π/611+cotx+π/3π/611+tanxdx

=π/3π/61+tanx+1+cotx(1+cotx)(1+tanx)dx

=π/3π/62+tanx+cotx2+tanx+cotxdx

2I=π3π6=π6

I=π12
Hence, the answer is π12.


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