$\int \frac{\sec^2 x}{(1 + \tan x)(2 + \tan x)} \, dx$ ની કિંમત શોધવા માટે,સૌથી યોગ્ય આદેશ (substitution) કયો છે?

  • A
    $1 + \tan x = t$
  • B
    $2 + \tan x = t$
  • C
    $\tan x = t$
  • D
    આમાંથી કોઈ નહીં

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