document.write( "Question 952851: How do you find the exact value of sin 18 degrees in radical form? \n" ); document.write( "
Algebra.Com's Answer #581881 by Alan3354(69443)\"\" \"About 
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How do you find the exact value of sin 18 degrees in radical form?
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\n" ); document.write( "= \"%28sqrt%285%29+-+1%29%2F4\" from Wikipedia, but I don't know how to derive that.
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