# Homework Help: Calculating area of an ellipse

1. Jan 24, 2012

### Miike012

Where did I go wrong? I showed all my work in the paint document...

My thought is that I am using the incorrect approx rec and I am guessing that it extends into both the first and second quad, and not just the first quad, as I indicated in my picture.

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2. Jan 24, 2012

### Miike012

I added another picture... I hope it is more legible.

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3. Jan 24, 2012

### SammyS

Staff Emeritus
It appears to be simply a matter of a misplaced parenthesis.

4. Jan 24, 2012

### Miike012

I looked at it again and It looks correct to me, the parenthesis that is.

5. Jan 24, 2012

### Dick

The second term in your indefinite integral should be (1/2)*a^2*arcsin(2/a).

6. Jan 24, 2012

### Miike012

Thank you.... Actually I did leave out a parenthesis... the factor of 1/2 of the first term inside the parenthesis is actually suppose to be a factor of both terms in side the parenthesis.

7. Jan 24, 2012

### SammyS

Staff Emeritus
Yes, I should have been more specific about where the missing parenthesis was to be located.