$\tan 2 \alpha \cdot \tan \left(30^{\circ}-\alpha\right)+\tan 2 \alpha \cdot \tan \left(60^{\circ}-\alpha\right)+\tan \left(60^{\circ}-\alpha\right) \cdot \tan \left(30^{\circ}-\alpha\right)$ ની કિંમત શું થાય?

  • A
    $\tan 3 \alpha$
  • B
    $\tan ^2 2 \alpha-\tan ^2 60^{\circ}$
  • C
    $1$
  • D
    $0$

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