Hello

The integrating actor of the diferential eqn

2cos(y^2)dx - xysin(y^2) dy = 0 is

a) e^x

b) e^(-x)

c) 3x

d) x^3

Writing in terms of dx/dy I got the anwer to be (cos(y^2))^(1/4). its not even one of the options

But in terms of dy/dx I dont know what the answer is :(