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(8*cos((2*x)/30))'The calculation above is a derivative of the function f (x)
(8)'*cos((2*x)/30)+8*(cos((2*x)/30))'
0*cos((2*x)/30)+8*(cos((2*x)/30))'
0*cos((2*x)/30)+8*-sin((2*x)/30)*((2*x)/30)'
0*cos((2*x)/30)+8*-sin((2*x)/30)*(((2*x)'*30-(2*x*(30)'))/(30^2))
0*cos((2*x)/30)+8*-sin((2*x)/30)*((((2)'*x+2*(x)')*30-(2*x*(30)'))/(30^2))
0*cos((2*x)/30)+8*-sin((2*x)/30)*(((0*x+2*(x)')*30-(2*x*(30)'))/(30^2))
0*cos((2*x)/30)+8*-sin((2*x)/30)*(((0*x+2*1)*30-(2*x*(30)'))/(30^2))
0*cos((2*x)/30)+8*-sin((2*x)/30)*((2*30-(2*x*(30)'))/(30^2))
0*cos((2*x)/30)+8*-sin((2*x)/30)*((2*30-(2*x*0))/(30^2))
0*cos((2*x)/30)+8*1/15*(-sin((2*x)/30))
0*cos((2*x)/30)+8*-1/15*sin(x/15)
(-8/15)*sin(x/15)
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