# Area of a hemisphere(surface integral)

## 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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Dick
Homework Helper

## 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
$$\iint_S \|N(u,v)\|\mathrm du\mathrm dv,$$ 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.