Question

Cot12 cot38 cot52 cot60 cot78 And give me answer 1 upon root 3

Answer 1

cot12 cot38 cot60 cot52 cot78


=> cot(90 - 78) cot(90 - 52) cot60 cot52 cot78



=> tan78 tan52 × (1/√3) cot52 cot 78

$1 \times 1 \times \frac{1}{ \sqrt{3} } \\ \\ \frac{1}{ \sqrt{3} }$



I hope this will help you




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