The value of cos 20^(@) + cos 100^(@) + ...

The value of `cos 20^(@) + cos 100^(@) + cos 140^(@)` is equal to a)`(1)/(2)` b)`(1)/(sqrt(3))` c)`sqrt(3)` d)0

A

`(1)/(2)`

B

`(1)/(sqrt(3))`

C

`sqrt(3)`

D

0

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The correct Answer is:

D

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