જો $\frac{\sin A - \sin C}{\cos C - \cos A} = \cot B$ હોય,તો $A, B, C$ એ શેમાં છે?

  • A
    $A.P.$
  • B
    $G.P.$
  • C
    $H.P.$
  • D
    આમાંથી કોઈ નહીં

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$\cos^2 73^\circ + \cos^2 47^\circ + (\cos 73^\circ \cdot \cos 47^\circ)$ ની ચોક્કસ કિંમત શું છે?

$\cos \alpha \sin (\beta - \gamma ) + \cos \beta \sin (\gamma - \alpha ) + \cos \gamma \sin (\alpha - \beta ) = $

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$\cos^2 \left( \frac{\pi}{4} - \beta \right) - \sin^2 \left( \alpha - \frac{\pi}{4} \right) = $

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