# Finding the equation of a tangent plane to a surface.

• April 9th 2011, 03:10 AM
rorosingsong
Finding the equation of a tangent plane to a surface.
Hi all, I'm stuck on this differential calculus question and would really appreciate some help...

Find the equation of the tangent plane to he surface
z = cos(x+y) + 1 at (0,0,2)

Thanks,
rorosingsong
• April 9th 2011, 04:23 AM
Plato
Quote:

Originally Posted by rorosingsong
Find the equation of the tangent plane to he surface z = cos(x+y) + 1 at (0,0,2)

All you have done is state a problem. Please either post some of your own work on these problems or explain what you do not understand about the question.

If $F(x,y,z)=\cos(x+y)-z+1$ then what is $\nabla F~?$
What has that to do with this problem?