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((1/2)*sin(2*x))'The calculation above is a derivative of the function f (x)
(1/2)'*sin(2*x)+(1/2)*(sin(2*x))'
0*sin(2*x)+(1/2)*(sin(2*x))'
0*sin(2*x)+(1/2)*cos(2*x)*(2*x)'
0*sin(2*x)+(1/2)*cos(2*x)*((2)'*x+2*(x)')
0*sin(2*x)+(1/2)*cos(2*x)*(0*x+2*(x)')
0*sin(2*x)+(1/2)*cos(2*x)*(0*x+2*1)
0*sin(2*x)+(1/2)*2*cos(2*x)
cos(2*x)
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