5 7. Use Beta and Gamma function to evaluate (2 2ax-x dx sin bx 8. Evaluate dx by using the rule of differentiation under the sign of integration. 9. Find the volume of the solid formed by the revolution of the cardiod r = a (1+cos) about initial line. OR Find the area bounded by the curve xy = a (a-y) and the x-axies 40. Solve the differential equation dy y y dx = + tan