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x^2/4 + Cos[Pi*x]/(2*Pi^2) + (x*Sin[Pi*x])/(2*Pi)


Integrate[(x/2)*(1 + Cos[Pi*x]), x] ==
x^2/4 + Cos[Pi*x]/(2*Pi^2) + (x*Sin[Pi*x])/(2*Pi)



          x
Integrate[- (1 + Cos[Pi x]), x] == 
          2

 2
x    Cos[Pi x]   x Sin[Pi x]
-- + --------- + -----------
4          2        2 Pi
       2 Pi

Time to compute: 0.01 second

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