त्रिकोणामितीय सारणी का प्रयोग किए बिना सिद्ध कीजिए : \[ \cot 5^{\circ} \cot 10^{\circ} \cot 30^{...

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त्रिकोणामितीय सारणी का प्रयोग किए बिना सिद्ध कीजिए :
\[
\cot 5^{\circ} \cot 10^{\circ} \cot 30^{\circ} \cot 80^{\circ} \cot 85^{\circ}=\sqrt{3}
\]
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