For the given Cartesian equation, write an equivalent polar equation.x2 + 4y2 = 4
A. r2(4 cos2 ? + sin2 ?) = 4
B. 4 cos2 ? + sin2 ? = 4r
C. cos2 ? + 4 sin2 ? = 4r
D. r2(cos2 ? + 4 sin2 ?) = 4
Answer: D
Mathematics
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