document.write( "Question 916450: What is the phase shift of y= 3- 4 cos pi/2 (2x+ 1/2) \n" ); document.write( "
Algebra.Com's Answer #556080 by lwsshak3(11628)\"\" \"About 
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What is the phase shift of y= 3- 4 cos pi/2 (2x+ 1/2)
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\n" ); document.write( "form of equation for cos function:
\n" ); document.write( "y=Acos(Bx-C)+d, A=amplitude,Period=2π/B,Phase shift=C/B,d=vertical shift
\n" ); document.write( "For given equation:
\n" ); document.write( "Rewrite:
\n" ); document.write( "y=-4cos(π/2*2x+π/2*1/2)+3
\n" ); document.write( "y=-4cos(πx+π/4)+3
\n" ); document.write( "B=π
\n" ); document.write( "C=π/4
\n" ); document.write( "phase shift=C/B=(π/4)/π=1/4
\n" ); document.write( "phase shift=1/4 (shift to the left) \n" ); document.write( "
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