Trigonometric EquationHard

Question

If , then

Options

A.tan2x =
B.
C.tan2x =
D.

Solution


3 sin4x + 2(1 - sin2x)2 =
⇒   25 sin4 x - 20 sin2 x + 4 = 0
⇒   sin2 x = and cos2 x =
∴   tan2 x = and

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