# Crazy quackulus problems

1. Mar 11, 2005

### Pengwuino

Ok i need a lil help here.. i got this question im not sure how to do

Find the equation of the tangent plane to the surface 7z+7=x(e^y)cos(z) at the point (7,0,0). Any know this?

2. Mar 11, 2005

### dextercioby

The equation of the plane is x=0...(the plane yOz)...

Compute the normal vector to the surface in the point (0,0,7).Show it is $$\vec{i}$$.

Daniel.