$\sin 50^\circ - \sin 70^\circ + \sin 10^\circ = $

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

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જો $\sqrt x + \frac{1}{{\sqrt x }} = 2\cos \theta$ હોય,તો ${x^6} + {x^{ - 6}} = $

$\cos \frac{\pi}{10} \cos \frac{2\pi}{10} \cos \frac{4\pi}{10} \cos \frac{8\pi}{10} \cos \frac{16\pi}{10}$ નું મૂલ્ય શું છે?

$\sqrt{3} \csc 20^\circ - \sec 20^\circ = $

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