Evaluate the integrals using integration by parts. Time left 0:32 1 / x sin(5.x) dx and it) / x cos(5x) dx Solution. x sin(5x) dx Set = X du = dx du = sin(5x) dx U = then x sin(5x) dx = / udu = uv udu = +C1 where C1 is a constant.ii) x cos(5x) dx Set U = dU = dx dV = dx V = then x2 cos (5x ) dx = / Udv = UV - / Vdu + C2 where C2 is a constant