જો $\operatorname{sech}^{-1} x = \log 2$ અને $\operatorname{cosech}^{-1} y = -\log 3$ હોય,તો $(x + y) = $

  • A
    $\frac{1}{6}$
  • B
    $\frac{1}{20}$
  • C
    $6$
  • D
    $\frac{5}{6}$

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જો $10 \sin^4 \theta + 15 \cos^4 \theta = 6$ હોય,તો $\frac{27 \operatorname{cosec}^6 \theta + 8 \sec^6 \theta}{16 \sec^8 \theta}$ ની કિંમત શોધો:

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