# Area of a hemisphere(surface integral)

## Homework Statement

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## Homework Equations

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## The Attempt at a Solution

I was finally able to find the parameters and do a cross product, i can double integrate but im unsure what to do in this circumstance(with the absolute value thing as well).

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## Answers and Replies

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Dick
Science Advisor
Homework Helper

## Homework Statement

Please view attached

## Homework Equations

Please view attached

## The Attempt at a Solution

I was finally able to find the parameters and do a cross product, i can double integrate but im unsure what to do in this circumstance(with the absolute value thing as well).
||N|| is the same thing as the length of the vector N. Use a little trig.

Fredrik
Staff Emeritus
Science Advisor
Gold Member
Clurt, when you post in the homework forum, you are expected to show your attempt to solve the problem up to the point where you get stuck. You're asking about what do about the "absolute value thing" in
$$\iint_S \|N(u,v)\|\mathrm du\mathrm dv,$$ where N is a function you have already found. The obvious first step is to look up the definition of ##\|\ \|## in your book and try to use it. We won't have a lot to say until you have done that.