જો $\sec \theta + \tan \theta = m$ $(m > 1)$ હોય,તો $\sin \theta$ ની કિંમત શોધો $(0^{\circ} < \theta < 90^{\circ})$.

  • A
    $\frac{1-m^{2}}{1+m^{2}}$
  • B
    $\frac{m^{2}-1}{m^{2}+1}$
  • C
    $\frac{m^{2}+1}{m^{2}-1}$
  • D
    $\frac{1+m^{2}}{1-m^{2}}$

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$\frac{\sin^2 A - \sin^2 B}{\sin A \cos A - \sin B \cos B} = $

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