$\sin^6 \theta + \cos^6 \theta + 3 \sin^2 \theta \cos^2 \theta = $

  • A
    $0$
  • B
    $-1$
  • C
    $1$
  • D
    इनमें से कोई नहीं

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$\cos^2 48^\circ - \sin^2 12^\circ = $

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