Asked by Tati

Convert from polar to rectangular r=3cos2theta
Answered by bobpursley
x= r cosTheta=3cos(2Theta)cosTheta
y= r sin Theta=3cos(2Theta)sinTheta
Answered by Bosnian
In google type :

r=3cos2theta

When you see list of results click on :

Advanced Math: precal, trig identities, conversion

You will see answer.
Answered by Tati
Identities r everywhere!!! :/, thank you 4 the info appreciated