The cardioid ; find the length of its circumference.

The formula for polar equations:

is what stumps me, how do i convert that to something that can be integrated?

Thanks

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- October 11th 2010, 06:30 PMarzeFind circumference of cardioid
The cardioid ; find the length of its circumference.

The formula for polar equations:

is what stumps me, how do i convert that to something that can be integrated?

Thanks - October 11th 2010, 08:45 PMmr fantastic
integrate Sqrt[1 - Sin[x]] - Wolfram|Alpha

Click on Show steps. - October 11th 2010, 08:56 PMarze
- October 11th 2010, 09:18 PMSoroban
Hello, arze!

Quote:

The cardioid ; find the length of its circumference.

We have: .

Multiply by

. . . . . . . . . . . . .

Got it?

- October 11th 2010, 09:19 PMarze
yes, got it!

Thanks! - October 11th 2010, 09:34 PMarze
ok, now i have another problem. between pi and 0, u has the same values, what values should i use? for the angles?