Question 1014048
 For y=-5/3sin2pix find amplitude,period and graph.
amp:: 5/3
period:: (2pi)/(2pi) = 1 
{{{graph(400,400,-6,6,-4,4,(-5/3)sin(2*pi*x))}}}
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Also 
For y=-4cos2pi/3x find amplitude,period and graph.
amp:: 4
period:: (2pi)/(2pi/3) = 3
{{{graph(400,400,-6,6,-5,5,-4*cos(2*pi*x/3))}}}
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Cheers,
Stan H.
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