# Math Help - Implicit Differentiation

1. ## Implicit Differentiation

I am having problems solving this problem for dy/dx:

sin(xy)+x^3+y^4 = 0

I get an answer like dy/dx = (-3x^2)/((cos(xy)(x+y)+4y^3))

but this is wrong help!

2. ## Re: Implicit Differentiation

Originally Posted by Jackwar42
I am having problems solving this problem for dy/dx:

sin(xy)+x^3+y^4 = 0

I get an answer like dy/dx = (-3x^2)/((cos(xy)(x+y)+4y^3))

but this is wrong help!
The derivative of sin(xy) is cos(xy)(y + xy').

-Dan