Trigonometric EquationHard
Question
If 
, then
, thenOptions
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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