cos 1^(@) + cos2^(@) + cos 3^(@) + ….+co...

` cos 1^(@) + cos2^(@) + cos 3^(@) + ….+cos 180^(@)` is equal to............. `(A) 0 (B) 1 (C) -1 (D) 2 `

A

0

B

1

C

`-1`

D

2

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The correct Answer is:

C

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