જો $m \tan (\theta - 30^\circ) = n \tan (\theta + 120^\circ)$ હોય,તો $\frac{m + n}{m - n} = $

  • A
    $2 \cos 2\theta$
  • B
    $\cos 2\theta$
  • C
    $2 \sin 2\theta$
  • D
    $\sin 2\theta$

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જો $\tan A = \frac{1}{2}$ અને $\tan B = \frac{1}{3}$ હોય,તો $\cos 2A = $

જો $\theta$ અને $\phi$ એ $1^{st}$ ચરણમાં આવેલા ખૂણાઓ હોય કે જેથી $\tan \theta = 1/7$ અને $\sin \phi = 1/\sqrt{10}$ હોય,તો:

$\sin 15^{\circ}$ નું મૂલ્ય શોધો.

જો $0 < A < B < \frac{\pi}{4}$,$\cos (A+B) = \frac{11}{61}$ અને $\sin (A-B) = \frac{24}{25}$ હોય,તો $\sin 2A + \sin 2B = $

$\tan\, 20^{\circ} + \tan\, 40^{\circ} + \sqrt{3}\, \tan\, 20^{\circ} \tan\, 40^{\circ}$ ની કિંમત શું થાય?

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