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((1/4)*sin(3.14*x))'The calculation above is a derivative of the function f (x)
(1/4)'*sin(3.14*x)+(1/4)*(sin(3.14*x))'
0*sin(3.14*x)+(1/4)*(sin(3.14*x))'
0*sin(3.14*x)+(1/4)*cos(3.14*x)*(3.14*x)'
0*sin(3.14*x)+(1/4)*cos(3.14*x)*((3.14)'*x+3.14*(x)')
0*sin(3.14*x)+(1/4)*cos(3.14*x)*(0*x+3.14*(x)')
0*sin(3.14*x)+(1/4)*cos(3.14*x)*(0*x+3.14*1)
0*sin(3.14*x)+(1/4)*3.14*cos(3.14*x)
0.785*cos(3.14*x)
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