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Mathematics
Hugo Roy
3 July, 23:34
What is the exact value of sin (165) degrees?
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Lewis Bailey
4 July, 02:08
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sin 165 = sin (120 + 45) = sin 120 cos 45 + cos 120 sin 45 =
[sqrt (3) / 2 * sqrt (2) / 2] + (-1/2) (sqrt (2) / 2) =
[sqrt (6) - sqrt (2) ] / 4
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