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(-500*sin(500*x))'The calculation above is a derivative of the function f (x)
(-500)'*sin(500*x)-500*(sin(500*x))'
0*sin(500*x)-500*(sin(500*x))'
0*sin(500*x)-500*cos(500*x)*(500*x)'
0*sin(500*x)-500*cos(500*x)*((500)'*x+500*(x)')
0*sin(500*x)-500*cos(500*x)*(0*x+500*(x)')
0*sin(500*x)-500*cos(500*x)*(0*x+500*1)
0*sin(500*x)-500*500*cos(500*x)
-250000*cos(500*x)
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