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Today's calculation of Integral 28

Source: 1992 Tokyo Institute of Technology

May 28, 2005
calculusintegrationtrigonometrycalculus computations

Problem Statement

Evaluate ∫0π4xcos⁡5xcos⁡xdx\int_0^{\frac{\pi}{4}} \frac{x\cos 5x}{\cos x}dx
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