PROBLEM : Evaluate ∬ xy(x+y) 2 /(x 2 +y 2 ) dxdy where E is region bounded y=0,y=x,x 2 +y 2 =a 2 in the first quadrant. SOLUTION : Evaluate ∬ f(x,y) dxdy where f(x,y)= (2y-1)/ x+1 , and E is the region bounded by x=0,y=0, y=2x- 4. * Change the order of integration and hence show that ∬dx dy/[ ( 1+e^y) √(1-x^2-y^2)] = (𝝿 /2) log(2e/(1+e) where x-0 to x=1 and y=0 to y=√(1-x^2) * In the integral ∬ (4-y) dydx, change the order of integration and evaluate the integral where x=2 to x=4 and y=4/x to y=(20-4x)/(8-x) * Sketch the region of integration and evaluate ∬ xsiny dydx where x=0 to x=𝛑 and y-0 to...