Question

find the value of cot10 cot30 cot80

Answer 1

Heya mate!!(Extra Hello for BTS army)

Here's your answer!!

cot10 . cot30 . cot 80

=> cot10 . cot30 . cot(90 - 10)

=> cot10 . cot30 . tan10

=> cot10 . tan10 . cot30

=> 1 × cot30

=> cot30

=> √3

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Answer 2

Answer:√3

Step-by-step explanation:

cot10 * cot30 * cot80 = tan(90-80) * cot30 * cot 80

=tan80 * cot30 * cot80

=tan80 * cot30 * 1/tan80

=1 * cot30=cot30=1/tan30=1/(1/√3)=√3