[" If "f(2010)=pi/2,f(x)=f(2x)AA x in R"...

[" If "f(2010)=pi/2,f(x)=f(2x)AA x in R" and "f(x)" is continuous "],[" for "x in R," then the value of "lim_(x rarr0)(cos(f(x))-root(3)(cos(f(x))))/(sin^(2)x)" is "]

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