Question 2 Find the integral sin xcosx x 0 1 1 7 cos x - 5 cos x + C 0 1 9 cos x - 7 cos x + C - 7 cos x + 5 cos'x + C 1 0 1 - 9 cos * + 7 cos x + C Question 3 Find the integral using an appropriate trigonometric substitution. x2 +4