- #1
Ted123
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Homework Statement
[PLAIN]http://img576.imageshack.us/img576/1710/vectorp.png [Broken]
Homework Equations
The Attempt at a Solution
I've done part (a) but how do I do (b)?
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Well, do you know how to find a tangent vector to the surface G?
This site may help you. Since your equation is defined in two variables u and v, I would try taking the partial derivatives with respect to u and v, and you should get two tangent vectors. Then you should check to see if they are linearly independent.
That's odd. I'm not sure you're doing it right, then... remember that:
1. [tex]\sqrt{cosh^2(u)} = cosh(u)[/tex]. This will simplify both of your calculations when finding the second unit tangent vector.
2. sin(pi/4) and cos(pi/4) are not zero.
What happened to the unit vectors i and j?
But that last line is just not true. -i+j does not equal 0.
Presumably, yes. And the link I provided above also shows you how to find the normal vector.