Sketching graph r=2a(1+cos(theta))

how is this done in polar coordinates? and what will the limits of the area be in terms of theta and r for integrating?

thankyou xxx

Reply 1

m:)ckel

isn't this just a cardioid?.....if you have the heinemann P4 book, then see Example 1, on page 116

Reply 2

Cille

How about r = a[1 + 2cos(theta)]?

The Heinemann Book won't get you far on that with its silly position on values of r < 0 !

Reply 3

inactive__user

it just isnt defined for r is negative (ie between theta = 2 Pi / 3 and theta = 4 Pi/3 there is simply no line). At least this is the way i have learnt it...as there are different definitions on difference syllabusses there may be some courses which say differently.

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