यदि $A=35^{\circ}, B=15^{\circ}$ और $C=40^{\circ}$ है,तो $\tan A \cdot \tan B+\tan B \cdot \tan C+\tan C \cdot \tan A$ का मान ज्ञात कीजिए।

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

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Similar Questions

$\cos A + \cos (240^\circ + A) + \cos (240^\circ - A) = $

यदि $\frac{\sin(x + y)}{\sin(x - y)} = \frac{a + b}{a - b}$ है,तो $\frac{\tan x}{\tan y}$ का मान ज्ञात कीजिए।

$\sin {163^\circ} \cos {347^\circ} + \sin {73^\circ} \sin {167^\circ} = $

यदि $\sin \theta = \frac{-12}{13}$,$\cos \phi = \frac{-4}{5}$ और $\theta, \phi$ तीसरे चतुर्थांश में स्थित हैं,तो $\tan(\theta - \phi) =$

$1+\cos 10^{\circ}+\cos 20^{\circ}+\cos 30^{\circ}=$

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