$\sin 20^\circ \sin 40^\circ \sin 60^\circ \sin 80^\circ = $ ($/16$ में)

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

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$\frac{{\sin 3\theta - \cos 3\theta }}{{\sin \theta + \cos \theta }} + 1 = $

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यदि $0 < \theta < \pi$ है,तो $3\sin \theta + \csc^3 \theta$ का न्यूनतम मान क्या है?

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