यदि $A + B + C = 180^o$ है,तो $(\cot B + \cot C)(\cot C + \cot A)(\cot A + \cot B)$ का मान क्या होगा?

  • A
    $\sec A \sec B \sec C$
  • B
    $\csc A \csc B \csc C$
  • C
    $\tan A \tan B \tan C$
  • D
    $1$

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