Continuity and DifferentiabilityMedium

Question

If x = f (m) cos m − f′ (m) sin m and y = f (m) sin m + f′ (m) cos m, thenequals-

Options

A.[f(m) + f″ (m)]2
B.[f(m) − f″ (m)]2
C.{f(m)}2 + {f′(m)}2
D.{f(m)2/{f′(m)}2

Solution

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