ત્રિકોણ $ABC$ માં,જો $a-2b+c=0$ હોય,તો $\cot \left(\frac{A}{2}\right) \cdot \cot \left(\frac{C}{2}\right) = $

  • A
    $1$
  • B
    $2$
  • C
    $3$
  • D
    $4$

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$\triangle ABC$ માં,જો $a \cos^2 \frac{C}{2} + c \cos^2 \frac{A}{2} = \frac{3b}{2}$ હોય,તો $a+c : b =$

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