Question

solve this plzzzzzz​

Answer 1

Step-by-step explanation:

FOR Q.12

y=x^3.e^×

dy/dx = 3x^2.e^x + x^3.e^x

FOR Q.13

tan^-1(1) + cos^-1(1/2)= tan^-1(tan(pi/4) ) +pi - cos^-1(cos(pi/3)

=pi/4+pi -pi/3

= (3pi+12pi-4pi)/12

=11pi/12