MCQ
In a ΔABC, 2ab sin`((A + B - C)/2)` = ______
  • A
    $b^2-c^2-a^2$
  • $a^2+b^2-c^2$
  • C
    $c^2-a^2-b^2$
  • D
    $c^2+a^2-b^2$

Answer

Correct option: B.
$a^2+b^2-c^2$
B

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