$\tan 9^{\circ} - \tan 27^{\circ} - \tan 63^{\circ} + \tan 81^{\circ}$ નું મૂલ્ય શું છે?

  • A
    $2$
  • B
    $3$
  • C
    $4$
  • D
    આમાંથી કોઈ નહીં

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$5 \sin^2 \theta + 4 \cos^2 \theta$ ની ન્યૂનતમ કિંમત કેટલી છે?

જો $\theta+\phi=\frac{2 \pi}{3}$ અને $\cos \theta=\frac{\sqrt{3}}{2}$ હોય,તો $\sin \phi$ ની કિંમત શું થાય?

$\frac{\tan 40^{\circ}+\tan 20^{\circ}}{1-\cot 70^{\circ} \cot 50^{\circ}}$ નું મૂલ્ય કેટલું થાય?

જો $\tan \theta = \frac{a}{b}$ હોય,તો $\frac{{\sin \theta }}{{{{\cos }^8}\theta }} + \frac{{\cos \theta }}{{{{\sin }^8}\theta }} = $

જો $\tan \left( \frac{\pi}{4} + \theta \right) + \tan \left( \frac{\pi}{4} - \theta \right) = \lambda \sec 2\theta$ હોય,તો $\lambda$ =

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