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Cos 40^(@) + Cos80^(@) + Cos160^(@) + Co...

`Cos 40^(@) + Cos80^(@) + Cos160^(@) + Cos240^(@)` =

A

0

B

1

C

`1//2`

D

`-1//2`

Text Solution

Verified by Experts

The correct Answer is:
D
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