If $A + B + C = {180^o},$ then the value of $(\cot B + \cot C)$ $(\cot C + \cot A)\,\,(\cot A + \cot B)$ will be
If $A + B + C = {180^o},$ then the value of $(\cot B + \cot C)$ $(\cot C + \cot A)\,\,(\cot A + \cot B)$ will be
- 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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The value of $\tan 9^{\circ}-\tan 27^{\circ}-\tan 63^{\circ}+\tan 81^{\circ}$ is $............$.
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- [JEE MAIN 2023]
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