જો $x + y = \frac{\pi}{4}$ હોય, તો $(1 + \tan x)(1 + \tan y) =$ શોધો.

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

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જો $\cos (\alpha + \beta) = \frac{3}{5}$,$\sin (\alpha - \beta) = \frac{5}{13}$ અને $0 < \alpha, \beta < \frac{\pi}{4}$ હોય,તો $\tan (2\alpha)$ ની કિંમત શોધો.

$\cos \alpha \sin (\beta-\gamma) + \cos \beta \sin (\gamma-\alpha) + \cos \gamma \sin (\alpha-\beta)$ ની કિંમત શું થાય?

$\cos^2 \left( \frac{\pi}{6} + \theta \right) - \sin^2 \left( \frac{\pi}{6} - \theta \right) = $

$\sin 47^\circ + \sin 61^\circ - \sin 11^\circ - \sin 25^\circ$ ની કિંમત શોધો.

$\frac{1}{4} [\sqrt{3} \cos 23^\circ - \sin 23^\circ] = $

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