$2 \sin ^{2} \theta+4 \sec ^{2} \theta+5 \cot ^{2} \theta+2 \cos ^{2} \theta-4 \tan ^{2} \theta-5 \operatorname{cosec}^{2} \theta = \dots$

  • A
    $4$
  • B
    $3$
  • C
    $2$
  • D
    $1$

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$\tan 15^{\circ}$ અને $\ldots \ldots \ldots \ldots$ ની કિંમત સમાન છે.

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જો $\cos 9 \alpha = \sin \alpha$ અને $9 \alpha < 90^{\circ}$ હોય,તો $\tan 5 \alpha$ ની કિંમત શોધો.

$\frac{\cos (90^{\circ}- A ) \sin (90^{\circ}- A )}{\tan (90^{\circ}- A )}$ નું સાદું રૂપ ....... છે.

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