Which of the following is equal to cot80.cot70.cot60.____.cot10?
a)0
b)1
c)√2
d)√3
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Description for Correct answer:
cot10∘.cot20∘.cot60∘.cot70∘.cot80∘
In cotA.cotB if A+B=90∘ then cotA.cotB=1
cot10∘.cot20∘.cot60∘.cot70∘.cot80∘
In cotA.cotB if A+B=90∘ then cotA.cotB=1
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