त्रिकोणमितीय फलन $\sin 765^{\circ}$ का मान ज्ञात कीजिए।

  • A
    $\frac{1}{2}$
  • B
    $\frac{\sqrt{3}}{2}$
  • C
    $\frac{1}{\sqrt{2}}$
  • D
    $1$

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$\cos 1^\circ + \cos 2^\circ + \cos 3^\circ + \dots + \cos 180^\circ = $

$\cos 18^{\circ} = $

यदि $\theta = \frac{17 \pi}{3}$ है,तो $(\tan \theta - \cot \theta) = \dots$

$\cos 1^\circ \cdot \cos 2^\circ \cdot \cos 3^\circ \cdot \dots \cdot \cos 179^\circ = $

निम्नलिखित में से कौन सा संबंध संभव है?

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