MathDB
Today's calculation of Integral 347

Source: 2008 Ibaraki University entrance exam/Science

June 20, 2008
calculusintegrationtrigonometrycalculus computations

Problem Statement

For real positive numbers a a, find the minimum value of \int_0^{\pi} \left(\frac{x}{a}\plus{}a\sin x\right)^2 dx.