Can anybody

Find the sum of

cos 1 deg. + cos 3 deg. + cos 5 deg.+ ... + cos 177 deg. + cos 179 deg.

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- December 4th 2010, 05:07 AM #1

- December 4th 2010, 06:59 AM #2

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- December 4th 2010, 03:19 PM #3

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- December 4th 2010, 04:28 PM #4

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