82 Indefinite Integrals 12. If xex cos xdx = ae* (b(1-x)sin x + (x cos x))+d, where d is constant of integration, then 2a-2be 13. Let f(x)=xsinx (1+xcosx In x + sin x)dx and f (x+1)dx 14. Let f(x) = ( +3x+6) and f(-1)= 21/3 (27). = Then the value of |cosf(2)| is Then the value of f(-2) is 15. If TA*+9) x dx x e X e Inx dx = A +B e is_ +c, where c is constant of integration, then the value of A