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Evaluate : cot 10^(@) .cot20^(@).cot30^(...

Evaluate : `cot 10^(@) .cot20^(@).cot30^(@).cot40^(@) ………cot90^(@)`.

A

1

B

-1

C

`(sqrt3)/(2)`

D

0

Text Solution

Verified by Experts

The correct Answer is:
D
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