SOLUTION: How do you find the exact value of sin 18 degrees in radical form?

SOLUTION: How do you find the exact value of sin 18 degrees in radical form?

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Question 952851: How do you find the exact value of sin 18 degrees in radical form?
Answer by Alan3354(69443) (Show Source): You can put this solution on YOUR website!
How do you find the exact value of sin 18 degrees in radical form?
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= from Wikipedia, but I don't know how to derive that.
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