જો $A + B + C = {180^o},$ તો $(\cot B + \cot C)$ $(\cot C + \cot A)\,\,(\cot A + \cot B) = . . . .$
જો $A + B + C = {180^o},$ તો $(\cot B + \cot C)$ $(\cot C + \cot A)\,\,(\cot A + \cot B) = . . . .$
- A
$\sec A\,\sec B\,\sec C$
- B
${\rm{cosec}}\,A\,{\rm{cosec}}\,B\,{\rm{cosec}}\,C$
- C
$\tan A\,\tan B\,\tan C$
- D
$1$
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