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OpenStudy (anonymous):
write the equation in rectangular coordinates (x,y) r = cos t
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OpenStudy (anonymous):
I know rcos = x so i multiplied r on both sides. |dw:1352851237477:dw| but i dunno how to solve this. can someone help me please?
OpenStudy (asnaseer):
you are almost there - think of how \(r^2\) is related to x and y.
OpenStudy (anonymous):
got it. x^2 + y^2, haha :)
OpenStudy (asnaseer):
thats it - well done! :)
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