$\tan \frac{2 \pi}{7} \cdot \tan \frac{4 \pi}{7} + \tan \frac{4 \pi}{7} \cdot \tan \frac{\pi}{7} + \tan \frac{\pi}{7} \cdot \tan \frac{2 \pi}{7} = $

  • A
    $7$
  • B
    $-7$
  • C
    $3$
  • D
    $-3$

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Similar Questions

જો $x = \log \left[ \cot \left( \frac{\pi}{4} + \theta \right) \right]$ હોય, તો $\sinh x$ ની કિંમત શું થાય?

જો $\tan \theta_1 = k \cot \theta_2$ હોય,તો $\frac{\cos (\theta_1 + \theta_2)}{\cos (\theta_1 - \theta_2)} = $

જો $x \neq -y$ અને $\sin x + \sin y = 3(\cos y - \cos x)$ હોય,તો $\tan(x - y) =$

જો $\frac{\sin ^4 x}{2}+\frac{\cos ^4 x}{3}=\frac{1}{5}$ હોય,તો
$(A) \tan ^2 x=\frac{2}{3}$ $(B) \frac{\sin ^8 x}{8}+\frac{\cos ^8 x}{27}=\frac{1}{125}$
$(C) \tan ^2 x=\frac{1}{3}$ $(D) \frac{\sin ^8 x}{8}+\frac{\cos ^8 x}{27}=\frac{2}{125}$

સંખ્યા $\sum_{k=0}^{44} \frac{1}{\cos k^{\circ} \cos (k+1)^{\circ}}$ નો પૂર્ણાંક ભાગ શોધો.

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