# Derivatives for calculus!

• April 26th 2009, 02:52 AM
Dranalion
Derivatives for calculus!
Hi, I need help for this derivative problem;

Find dy/dx in terms of x and y for:

xy = tan(xy)

Any help is much appreciated,

Dranalion.
• April 26th 2009, 03:15 AM
Mush
Quote:

Originally Posted by Dranalion
Hi, I need help for this derivative problem;

Find dy/dx in terms of x and y for:

xy = tan(xy)

Any help is much appreciated,

Dranalion.

Differentiate implicitly.

$\frac{d}{dx} (xy) = x\frac{d}{dx}(y) + y\frac{d}{dx}(x)$

$\frac{d}{dx} \tan(xy) = \frac{d}{d(xy)} \tan(xy) \times \frac{d}{dx}(xy)$
• April 26th 2009, 03:46 AM
mr fantastic
Quote:

Originally Posted by Dranalion
Hi, I need help for this derivative problem;

Find dy/dx in terms of x and y for:

xy = tan(xy)

Any help is much appreciated,

Dranalion.