# How do you sketch #f(x,y) = ln(x^2+y^2)#?

##### 1 Answer

Feb 23, 2015

Hello,

Let

Remark that

where

So, graph the curve of equation

Finally, rotate this curve around the

Feb 23, 2015

Hello,

Let

Remark that

where

So, graph the curve of equation

Finally, rotate this curve around the