document.write( "Question 695719: what is the cos-4.5*pi? \n" ); document.write( "
Algebra.Com's Answer #428623 by stanbon(75887)\"\" \"About 
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what is the cos-4.5*pi?
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\n" ); document.write( "cos(-4.5pi) = cos(-4pi -0.5pi) = cos(-5pi) = 0
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\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H.
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