document.write( "Question 1161865: Two frequencies of sound are played on an instrument governed by the function n(t)=8cos(20pie*t)cos(1000pie*t). What is the peroid and frequency of the fast and slow oscillation? What is ampmitude? \n" ); document.write( "
Algebra.Com's Answer #785522 by Alan3354(69443)\"\" \"About 
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No math problems with pie.
\n" ); document.write( "Use the Greek letter pi.
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