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Evaluate: overset(pi/4)underset(0)intlog...

Evaluate: `overset(pi/4)underset(0)intlog(1+tan theta)d theta`.

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UNITED BOOK HOUSE-QUESTION PAPER 2017-EXERCISE
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  11. Evaluate: overset(pi/4)underset(0)intlog(1+tan theta)d theta.

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