The value of cot 10 . cot 20 . cot 60 . cot 70 . cot 80 is : – McqOptions

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1.	The value of cot 10 . cot 20 . cot 60 . cot 70 . cot 80 is :
A.	1
B.	1
C.
D.
Answer» E.

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