dy/dx = ((sin(x)*d/dx(10x) - 10x*d/dx(sin(x))/(10x)^2 =
(10*sin(x) - 10x*cos(x))/100x^2 = 10(sin(x) - x*cos(x))/100x^2 =
(sin(x) - x*cos(x))/10x^2
Объяснение:
