Первообразная для y=2cos^2(x/2)+1
y=2cos^2(x/2)+1={ 2cos^2(x/2)-1}+2=cos2*x/2+2=cosx+2
F(x)=sinx+2x+C
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y=2cos^2(x/2)+1={ 2cos^2(x/2)-1}+2=cos2*x/2+2=cosx+2
F(x)=sinx+2x+C