document.write( "Question 1161863: Two frequencies of sound are played on an instrument governed by tge function n(t)=8cos(20pie*t)cos(1000pie*). What is the peroid and frequency of the fast and slow oscillation? What is ampmitude? \n" ); document.write( "
Algebra.Com's Answer #785493 by ikleyn(52781)\"\" \"About 
You can put this solution on YOUR website!
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\n" ); document.write( "\n" ); document.write( "The formula in the post is written INCORRECTLY.\r
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