$0 \leq x \leq \frac{\pi}{4}$ માટે સમીકરણ $32^{\tan^{2} x} + 32^{\sec^{2} x} = 81$ ના ઉકેલોની સંખ્યા કેટલી છે?

  • A
    $3$
  • B
    $1$
  • C
    $0$
  • D
    $2$

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જો $\tan x = \frac{2b}{a - c}$ $(a \ne c)$,$y = a \cos^2 x + 2b \sin x \cos x + c \sin^2 x$ અને $z = a \sin^2 x - 2b \sin x \cos x + c \cos^2 x$ હોય,તો:

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જો $\cosh 2x = 199$ હોય,તો $\coth x$ ની કિંમત શોધો.

$\tan 1^{\circ}, \tan 2^{\circ}, \ldots, \tan 89^{\circ}$ નો ગુણોત્તર મધ્યક (geometric mean) શોધો.

જો $\tan \beta = \frac{\tan \alpha + \tan \gamma}{1 + \tan \alpha \tan \gamma}$ હોય,તો $\frac{\sin 2 \alpha + \sin 2 \gamma}{1 + \sin 2 \alpha \sin 2 \gamma} = $

$\frac{1}{\sin 1^{\circ} \sin 2^{\circ}}+\frac{1}{\sin 2^{\circ} \sin 3^{\circ}}+\frac{1}{\sin 3^{\circ} \sin 4^{\circ}}+\ldots+\frac{1}{\sin 89^{\circ} \sin 90^{\circ}} = ?$

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