$\Delta ABC$ में,$2ac \sin \left( \frac{A - B + C}{2} \right)$ किसके बराबर है?

  • A
    $a^2 + b^2 - c^2$
  • B
    $c^2 + a^2 - b^2$
  • C
    $b^2 - c^2 - a^2$
  • D
    $c^2 - a^2 - b^2$

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