document.write( "Question 1093349: Hello, this is the problem I'm stuck on.\r
\n" ); document.write( "\n" ); document.write( "Given that the exact value of sin pi/10=(-1+sqrt 5)/4, for each question calculate the exact value of the given expression. YOU MAY LEAVE NESTED RADICALS IN YOUR ANSWER, BUT RATIONALIZE ANY DENOMINATORS. \r
\n" ); document.write( "\n" ); document.write( "1. sin pi/20. \r
\n" ); document.write( "\n" ); document.write( "I appreciate any help and thanks in advance!
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Algebra.Com's Answer #708036 by Alan3354(69443)\"\" \"About 
You can put this solution on YOUR website!
Look at \"Half angle formulas\" on Wikipedia.
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