निश्चित समाकल $\int_{0}^{\frac{\pi}{4}} \tan x \,dx$ का मान ज्ञात कीजिए।

  • A
    $\frac{1}{2} \log 2$
  • B
    $\log 2$
  • C
    $\frac{1}{4} \log 2$
  • D
    $0$

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