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Find the area of an ellips



An ellips has a major axis "a" and a minor axis "b" as shown.

I also remember the ellips can be generated by an equation given by

The region D is described as a type dy dx region by:

Its area is therefore


Could I use Mathematic Enter exactly the following expressions into the Mathematica front end and hit the enter key . Magic: Here is the answer.


Another way .


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