The letters r and ? represent polar coordinates. Write the equation using rectangular coordinates (x, y).r = 1 + 2 sin ?

A. x2 + y2 =  + 2x
B. x2 + y2 =  + 2y
C.  = x2 + y2 + 2x
D.  = x2 + y2 + 2y

Answer: B

Mathematics

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