# \[!\] Calculus Help

**URL:** <https://forum.kirupa.com/t/calculus-help/251805>\
**Category:** random\
**Created:** [February 12, 2008, 8:35pm UTC](https://forum.kirupa.com/t/calculus-help/251805 "2008-02-12T20:35:28Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![hl1](https://yyz1.discourse-cdn.com/flex011/user_avatar/forum.kirupa.com/hl1/32/849_2.png) [@hl1](https://forum.kirupa.com/u/hl1)\
**Post date:** [February 12, 2008, 8:35pm UTC](https://forum.kirupa.com/t/calculus-help/251805/1 "2008-02-12T20:35:28Z")

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I need help with this really soon, I’ve been puzzling over it for a while now, and I’ve got a project due tomorrow.

I’m trying to integrate the following equation: ![](http://www.mathbin.net/equations/19408_0.png), depicted here: [http://files.harishlall.com/cardioid.jpg](http://files.harishlall.com/cardioid.jpg) (the one facing right is just the inverse).

I’ve just about determined that I can’t integrate it because it’s not a function (_wishes that it wasn’t recursive_). Now I’m trying to play with the cardioid in polar form, but does anyone know how to manipulate the polar equation for a cardioid to look something like that, and also do a 90 degree rotation. The cusp has to be on x=0 and it has to stretch to either x=6 or x=12.

Help, help, help!