Question

tan(x-y)=y/(9+x^2)

Answer 1

Find dy/dx by implicit differntiation

Answer 2

http://www.wolframalpha.com/input/?i=implicit+differentiation+tan%28x-y%29%3Dy%2F%289%2Bx%5E2%29

Answer 3

Try working it out and see if you get those answers. You want to isolate the y's.

Answer 4

Also:
http://www.youtube.com/watch?v=5yTVUZCaU6k

Patricks a legend when it comes to calculus, just give him a shot :P.

Answer 5

d(tanx-y)/dx
=(sec^2(x-y))(1-y')
=(y'(9+x^2)-2x*y)/(9+x^2)^2