यदि $\tan^2 \theta = 2\tan^2 \phi + 1$ है,तो $\cos 2\theta + \sin^2 \phi$ का मान ज्ञात कीजिए।

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

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