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