Question 8 (10 marks) sinx a) Given that the equation of a curve is y = x . . dy I) Find 3' (3 marks) ii) Find the exact value of the gradient of a tangent to the curve at the point where x = 1r. (1 mark) iii) Hence, find the exact equation of the tangent to the curve at the point where x = 1r. (3 marks) b) Find the exact area bounded by the curve y = sinx + 1,the line x = 1r, x axis and y axis