જો $\tan 80^{\circ} = a$ અને $\tan 47^{\circ} = b$ હોય,તો $\tan 37^{\circ}$ ની કિંમત કેટલી થાય?

  • A
    $\frac{a - b}{1 + ab}$
  • B
    $\frac{ab + 1}{a - b}$
  • C
    $\frac{ab - 1}{a + b}$
  • D
    $\frac{a + b}{1 - ab}$

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$\sin^2 \frac{\pi}{8} + \sin^2 \frac{3\pi}{8} + \sin^2 \frac{5\pi}{8} + \sin^2 \frac{7\pi}{8}$ નું મૂલ્ય શું છે?

$\cos \alpha \sin (\beta - \gamma ) + \cos \beta \sin (\gamma - \alpha ) + \cos \gamma \sin (\alpha - \beta ) = $

$\frac{{\tan A + \sec A - 1}}{{\tan A - \sec A + 1}} = $

જો $\cos A + \cos B = \cos C$ અને $\sin A + \sin B = \sin C$ હોય,તો પદાવલિ $\frac{\sin(A + B)}{\sin 2C}$ ની કિંમત શું થાય?

$\cos \frac{\pi}{2^2} \cdot \cos \frac{\pi}{2^3} \cdot \dots \cdot \cos \frac{\pi}{2^{10}} \cdot \sin \frac{\pi}{2^{10}}$ ની કિંમત શોધો.

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