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Find the value of cos 12^(@)+cos 84^(@)+...

Find the value of `cos 12^(@)+cos 84^(@)+cos 156^(@)+cos 132^(@)`

A

`1/2`

B

1

C

`-1/2`

D

`1/8`

Text Solution

Verified by Experts

The correct Answer is:
C
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Knowledge Check

  • The value of cos 12^(@)+ cos 84^(@) +cos 156^(@) + cos 132^(@) is

    A
    `1//2`
    B
    1
    C
    `-1//2`
    D
    `1//8`

  • The value of cos 12^(@) + cos 84^(@) + cos 156^(@) + cos 132^(@) is

    A
    `(1)/(2)`
    B
    1
    C
    `- (1)/(2)`
    D
    `(1)/( 8 )`

  • The value of cos12^(@)+cos84^(@)+cos156^(@)+cos132^(@) is

    A
    `1//8`
    B
    `-1//2`
    C
    1
    D
    `1//2`

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