$\tan 4^{\circ} \tan 43^{\circ} \tan 47^{\circ} \tan 86^{\circ}$ નું મૂલ્ય શોધો.

  • A
    $1$
  • B
    $\frac{1}{2}$
  • C
    $2$
  • D
    $\frac{2}{3}$

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પદાવલિ $E = \sin \theta + \cos \theta + \sin 2\theta$ ની મહત્તમ કિંમત છે-

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