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

A. x2 + y2 = 2 + x
B. x2 + y2 = 1 + 2x
C. x2 + y2 = (1 + 2x)2
D. x2 + y2 = (2 + x)2


Answer: C

Mathematics

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