Practice problem
Find ∫xcosx dx.\int x\cos x \;\; dx.∫xcosxdx.
xsinx+cosx+Cx \sin x + \cos x + Cxsinx+cosx+C
xcosx+xsinx+Cx\cos x + x\sin x + Cxcosx+xsinx+C
xcosx+sinx+Cx \cos x + \sin x + Cxcosx+sinx+C
Type a concept, like “slope” or “photosynthesis”.