Finding the Area of an Ellipse in Calculus III

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SUMMARY

The area of the ellipse defined by the equation (x^2)/4 + (y^2)/9 = 1 can be calculated using double integrals, specifically by evaluating the integral of dA over the defined region. The approach involves solving for y and integrating from x = 0 to x = 2, which represents one-fourth of the total area. The complete area can then be derived by multiplying this result by four. This method is essential in Calculus III, where double integrals are utilized for area calculations.

PREREQUISITES
  • Understanding of double integrals in Calculus III
  • Familiarity with the equation of an ellipse
  • Knowledge of definite integrals and limits of integration
  • Ability to solve for y in terms of x from an ellipse equation
NEXT STEPS
  • Study the application of double integrals in area calculations
  • Learn how to convert between rectangular and polar coordinates
  • Explore the properties of ellipses and their equations
  • Practice solving definite integrals with various limits of integration
USEFUL FOR

Students in Calculus III, mathematics educators, and anyone looking to deepen their understanding of integration techniques for calculating areas of complex shapes like ellipses.

shinobi12
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Homework Statement



Find the area of the ellipse (x^2)/4 + (y^2)/9 = 1

Homework Equations



(1/2) * Integral of xdy - ydx = area of a Region


The Attempt at a Solution



The problem is weird to me because its complicated to attempt it in rectangular or polar coordinates)
 
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How is the equation you give in #2 relevant to this problem? It's possible that it is, but if so, you'll need to refresh my memory as to why that's so. Also, you'll need a definite integral, with limits of integration.

The way I would approach this problem is to solve for y (the positive solution) and integrate from x = 0 to x = 2. That number would be 1/4 of the area inside the ellipse.
 
Well since the title of the thread is calc 3, I guess this means you have learned about double integrals already. Evaluate \iint dA for that region to get the area.
 

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