SOLUTION: Find the exact value of sin 165°. Thank You
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Question 42619
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Find the exact value of sin 165°.
Thank You
Answer by
fractalier(6550)
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Okay we use the addition formula for sine and get
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