数学达人帮助求极限!当x->0时sin(x)=x+o(x)x*cos(x)=x-x^3/2!+o(x^3)sin(x)^
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数学达人帮助求极限!
当x->0时
sin(x)=x+o(x)
x*cos(x)=x-x^3/2!+o(x^3)
sin(x)^3=x^3+o(x)
lim(sin(x)-x*cos(x)/sin(x)^3=1/2
请问错在哪里?
谢谢!
当x->0时
sin(x)=x+o(x)
x*cos(x)=x-x^3/2!+o(x^3)
sin(x)^3=x^3+o(x)
lim(sin(x)-x*cos(x)/sin(x)^3=1/2
请问错在哪里?
谢谢!
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