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What is the exact value of sin (165) degrees?
4 months ago
Q:
What is the exact value of sin (165) degrees?
Accepted Solution
A:
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