MathDB
Today's calculation of Integral 676

Source:

February 7, 2011
calculusintegrationtrigonometrycalculus computations

Problem Statement

Let f(x)=cos⁡4x+3sin⁡4xf(x)=\cos ^ 4 x+3\sin ^ 4 x. Evaluate ∫0π2∣f′(x)∣dx\int_0^{\frac{\pi}{2}} |f'(x)|dx.
2011 Tokyo University of Science entrance exam/Management
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