document.write( "Question 1136457: Write an equation for the function as described below. A cosine curve with a period of 4π, and amplitude of ½, a left phase shift of π/2, and no vertical translation.
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Algebra.Com's Answer #754226 by josmiceli(19441)\"\" \"About 
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\"+f%28t%29+=+%281%2F2%29%2Acos%28+t%2F2+%2B+pi%2F2+%29+\"
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