# Is it correct?

1. Nov 10, 2009

Is it correct? unique perpendicular vector

1. The problem statement, all variables and given/known data

Find the unique vector which is perpendicular on z= $$\sqrt{x^2+y^2}$$ at P=(3,4,5)

2. Relevant equations

$$\frac{\nabla F}{\left| \nabla F\left|}$$

3. The attempt at a solution

The answer is $$\frac{\nabla F}{\left| \nabla F\left|}$$ and F(x,y,z)=$$\sqrt{x^2+y^2}$$-z so the answer is $$\frac{\nabla F}{\left| \nabla F\left|}$$= ($$\frac{0.6}{\sqrt{2}}$$ , $$\frac{0.8}{\sqrt{2}}$$ , $$\frac{-1}{\sqrt{2}}$$)

Last edited: Nov 10, 2009