નીચેનામાંથી કઈ સંખ્યા/સંખ્યાઓ સંમેય છે?

  • A
    $\sin 15^\circ$
  • B
    $\cos 15^\circ$
  • C
    $\sin 15^\circ \cos 15^\circ$
  • D
    $\sin 15^\circ \cos 75^\circ$

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$\cos^{3}\left(\frac{\pi}{8}\right) \cdot \cos\left(\frac{3\pi}{8}\right) + \sin^{3}\left(\frac{\pi}{8}\right) \cdot \sin\left(\frac{3\pi}{8}\right)$ ની કિંમત શોધો.

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$\tan 75^\circ - \cot 75^\circ = $

$\frac{\sin 70^\circ + \cos 40^\circ}{\cos 70^\circ + \sin 40^\circ} = $

કોઈપણ ત્રિકોણ $ABC$ માં,પદાવલિ ${\sin ^2}\frac{A}{2} + {\sin ^2}\frac{B}{2} + {\sin ^2}\frac{C}{2}$ કોના બરાબર છે?

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