$\Delta ABC$ में सामान्य संकेतों के साथ,यदि $C=90^{\circ}$ है,तो $\tan ^{-1}\left(\frac{a}{b+c}\right)+\tan ^{-1}\left(\frac{b}{c+a}\right)=$

  • A
    $\frac{\pi}{4}$
  • B
    $\frac{\pi}{6}$
  • C
    $\pi$
  • D
    $\frac{\pi}{3}$

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