यदि $\sin^{2}(10^{\circ}) \sin(20^{\circ}) \sin(40^{\circ}) \sin(50^{\circ}) \sin(70^{\circ}) = \alpha - \frac{1}{16} \sin(10^{\circ})$ है,तो $16 + \alpha^{-1}$ का मान ज्ञात कीजिए।

  • A
    $60$
  • B
    $70$
  • C
    $80$
  • D
    $90$

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यदि $\tan (\pi \cos \theta) = \cot (\pi \sin \theta)$ है,तो $\sin \left(\frac{\pi}{4} + \theta\right) =$

$\cos^2 10^\circ - \cos 10^\circ \cos 50^\circ + \cos^2 50^\circ$ का मान किसके बराबर है:

$\cos ^2(x)+\cos ^2\left(x+\frac{\pi}{3}\right)+\cos ^2\left(x-\frac{\pi}{3}\right) = $

यदि $(\sec A + \tan A)(\sec B + \tan B)(\sec C + \tan C) = (\sec A - \tan A)(\sec B - \tan B)(\sec C - \tan C)$ है,तो प्रत्येक पक्ष का मान क्या होगा?

$\sin 10^\circ + \sin 20^\circ + \sin 30^\circ + \dots + \sin 360^\circ$ का मान क्या है?

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