Zintegruj funkci f(x)=x \cdot \sin x metodou per partes.
=-x \cdot \sin x+\int \cos x d x=-x \cdot \sin x+\sin x+C
=-x \cdot \cos x+\int \sin x d x=-x \cdot \cos x-\cos x+C
=-x \cdot \cos x+\int \cos x d x=-x \cdot \cos x+\cos x+C
=-x \cdot \cos x+\int \cos x d x=-x \cdot \cos x+\sin x+C
