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(3*sin(2-x))'The calculation above is a derivative of the function f (x)
(3)'*sin(2-x)+3*(sin(2-x))'
0*sin(2-x)+3*(sin(2-x))'
0*sin(2-x)+3*cos(2-x)*(2-x)'
0*sin(2-x)+3*cos(2-x)*((-x)'+(2)')
0*sin(2-x)+3*((2)'-1)*cos(2-x)
0*sin(2-x)+3*(0-1)*cos(2-x)
0*sin(2-x)+3*-1*cos(2-x)
0*sin(2-x)+3*(-cos(2-x))
-3*cos(2-x)
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