$\frac{\sin^2 3A}{\sin^2 A} - \frac{\cos^2 3A}{\cos^2 A}$ का मान है

  • A
    $8 \cos 2A$
  • B
    $4 \cos 2A$
  • C
    $2 \cos 2A$
  • D
    $\cos 2A$

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