Posted by Tati on Sunday, March 18, 2012 at 6:11pm.
x= r cosTheta=3cos(2Theta)cosTheta
y= r sin Theta=3cos(2Theta)sinTheta
In google type :
r=3cos2theta
When you see list of results click on :
Advanced Math: precal, trig identities, conversion
You will see answer.
Identities r everywhere!!! :/, thank you 4 the info appreciated
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