$\sin 20^\circ \sin 40^\circ \sin 60^\circ \sin 80^\circ = $

  • A
    $ - 3/16$
  • B
    $5/16$
  • C
    $3/16$
  • D
    $ - 5/16$

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Similar Questions

सिद्ध कीजिए कि $\tan 3x \tan 2x \tan x = \tan 3x - \tan 2x - \tan x$.

यदि $\tan \alpha = \frac{1}{7}$ और $\sin \beta = \frac{1}{\sqrt{10}}$ जहाँ $0 < \alpha, \beta < \frac{\pi}{2}$ है,तो $2\beta$ का मान ज्ञात कीजिए।

कुछ $a, b, c \in R$ के लिए,यदि $\sin 5 \theta = a \cos^4 \theta \sin \theta + b \cos^2 \theta \sin^3 \theta + c \sin^5 \theta$ है,तो $abc =$

$\cot\, x + \cot\, (60^\circ + x) + \cot\, (120^\circ + x)$ का मान ज्ञात कीजिए:

$\tan 3A - \tan 2A - \tan A = $

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