Area of a hemisphere(surface integral)

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SUMMARY

The discussion focuses on calculating the area of a hemisphere using surface integrals. The user has successfully identified parameters and performed a cross product but is uncertain about handling the absolute value in the integral expression $$\iint_S \|N(u,v)\|\mathrm du\mathrm dv$$. The forum emphasizes the importance of showing attempts to solve problems before seeking help, particularly regarding the definition of the norm ||N||. Clarification on these concepts is essential for progressing in the solution.

PREREQUISITES
  • Understanding of surface integrals in multivariable calculus
  • Familiarity with vector calculus, specifically cross products
  • Knowledge of the concept of the norm of a vector
  • Ability to perform double integrals
NEXT STEPS
  • Review the definition of the norm of a vector in a calculus textbook
  • Study techniques for evaluating double integrals over surfaces
  • Practice problems involving surface area calculations using surface integrals
  • Explore examples of applying cross products in surface integral contexts
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Students studying multivariable calculus, particularly those learning about surface integrals and vector calculus applications.

clurt
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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 I am unsure what to do in this circumstance(with the absolute value thing as well).
 

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clurt said:

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 I am 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.
 
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.
 

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