$\tan \left[ {\frac{1}{2}{{\sin }^{ - 1}}\left( {\frac{{2a}}{{1 + {a^2}}}} \right) + \frac{1}{2}{{\cos }^{ - 1}}\left( {\frac{{1 - {a^2}}}{{1 + {a^2}}}} \right)} \right] = $

  • A
    $\frac{{2a}}{{1 + {a^2}}}$
  • B
    $\frac{{1 - {a^2}}}{{1 + {a^2}}}$
  • C
    $\frac{{2a}}{{1 - {a^2}}}$
  • D
    આમાંથી કોઈ નહીં

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