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For some reason I don't think I'm doing this right...

@amistre64 , got any ideas what I"m donig wrong?

the puals website is a great resource indeed

Oh I c, I'm supposed to convert it into a cartesian equation?

The question is, why can't I work with it while it's in polar form?

no

no need to convert - look at notes in the link I gave and all will become apparent :)

^^ - that is basically the summary result

so you just need to calculate dr/d(theta)

oh look! paul saves the day again. whew.

:)

Oh wow - thanks!

plug the result in the equation above, set it to zero and solve

there is one slight /twist/ in the solution - hopefully you will be able to see it :)

|dw:1353710144960:dw|

corrction, th=pi*(any integer)