Having trouble understanding this one:

r=sqrt(x^2 +y^2)

and

x= r cos theta

show

dr/dx * dx/dr not = 1

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- Mar 5th 2011, 02:28 AMheatlyPartial Derivitive QuestionHaving trouble understanding this one:

r=sqrt(x^2 +y^2)

and

x= r cos theta

show

dr/dx * dx/dr not = 1

- Mar 5th 2011, 03:00 AMProve It
Are you asked to show

$\displaystyle \displaystyle \frac{dr}{dx}\cdot\frac{dx}{dr} \neq 1$

or

$\displaystyle \displaystyle \frac{\partial r}{\partial x}\cdot\frac{\partial x}{\partial r} \neq 1$? - Mar 5th 2011, 03:23 AMheatly
The second one you wrote iam asked to show.

I actually thought they were both the same meaning,oops.

I worked it ou now.

Thanks for your post Prove it.