So it starts like this:

Find the derivative of y = isinx + cosx

And I don't know what I'm supposed to do with the complex number so I just sort of left it and got this:

dy/dx = -sinx + icosx

Which is equal to i * y

Then it says to

1) find dy/y

2) use the condition x=0 to determine the value ofc(constant of integration)

3) write this antiderivative in its equivalent form

I don't know what to do next! Please dumb it down as much as possible.