$\int {\frac{{1 + {{\tan }^2}x}}{{1 - {{\tan }^2}x}}\,dx} $ का मान ज्ञात कीजिए।

  • A
    $\log \left( {\frac{{1 - \tan x}}{{1 + \tan x}}} \right) + c$
  • B
    $\log \left( {\frac{{1 + \tan x}}{{1 - \tan x}}} \right) + c$
  • C
    $\frac{1}{2}\log \left( {\frac{{1 - \tan x}}{{1 + \tan x}}} \right) + c$
  • D
    $\frac{1}{2}\log \left( {\frac{{1 + \tan x}}{{1 - \tan x}}} \right) + c$

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