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The value of (cos 1^(@) +cos 2^(@) +cos ...

The value of `(cos 1^(@) +cos 2^(@) +cos 3^(@)+…+cos 180^(@))` is -

A

`sqrt2`

B

`1`

C

`-1`

D

0

Text Solution

Verified by Experts

The correct Answer is:
C
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Knowledge Check

  • The value of the expression cos 1^(@)cos 2^(@) cos 3^(@)…cos 179^(@) is -

    A
    1
    B
    `(1)/(sqrt2)`
    C
    `-(1)/(sqrt2)`
    D
    0

  • If sin x + sin ^(2)x =1, then the value of (cos ^(12) x+ 3 cos ^(10) x +3 cos ^(8) x+ cos ^(6)x) is-

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    1
    B
    4
    C
    2
    D
    3

  • If A+C+B=180, then the value of (cos ^(2) A+ cos ^(2) B +cos ^(2) C-2 cos A cos B cos C) is-

    A
    3
    B
    2
    C
    1
    D
    0

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