$(1+\cos \frac{\pi}{6})(1+\cos \frac{\pi}{3})(1+\cos \frac{2\pi}{3})(1+\cos \frac{7\pi}{6})$ का मान है

  • A
    $\frac{3}{16}$
  • B
    $\frac{3}{8}$
  • C
    $\frac{3}{4}$
  • D
    $\frac{1}{2}$

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यदि $A, B, C, D$ एक चक्रीय चतुर्भुज के क्रम में लिए गए कोण हैं,तो $\cos(180^{\circ} + A) + \cos(180^{\circ} - B) + \cos(180^{\circ} - C) - \sin(90^{\circ} - D) =$

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यदि $x = \sec \theta + \tan \theta$ है,तो $x + \frac{1}{x} = $

$\frac{1+\tanh \left(\frac{x}{2}\right)}{1-\tanh \left(\frac{x}{2}\right)} = $

$\tan \theta \sin \left( \frac{\pi }{2} + \theta \right) \cos \left( \frac{\pi }{2} - \theta \right) = $

$\tan (-945^\circ)$ का मान है

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