Question

If ycosx=xcosy find dy/dx when x=0 and y=0

Answer 1

use implicit differentiation

Answer 2

and product rules

Answer 3

It's been awhile but so i might not be right but ((cos(x)+x*sin(x)+cos(y)) all devided by cos^2(x) and plug in points from there.

Answer 4

x*sin x is x(sin(x)) not x^x if you have problems reading that like i do