Answers

2015-03-28T12:52:12+05:30
Since cos1 = -cos179
 so, cos1 + cos179 = 0.
Then everything from cos2 + cos 178, cos3 + cos 177, so on and so forth, will be 0 so ans for this is 0 
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  • Brainly User
2015-04-01T18:55:22+05:30
Since cos1 = -cos179
 so, cos1 + cos179 = 0. 
Then everything from cos2 + cos 178, cos3 + cos 177, so on and so forth, will be 0 so ans for this is 0 
0