Answers

2014-03-24T15:44:32+01:00
Since cos 0 to cos 90 are positive and cos 91 to cos 180 are negative of 0 to 90, their sum gives us zero. same for 181 to 270 and 271 to 360, but 360 which would have made the answer 1, is excluded so the answer gives us 0

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