用x趋向于0 sinx/x=1 怎么做lim(x→0) x^2/sin^2(X/3)

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用x趋向于0sinx/x=1怎么做lim(x→0)x^2/sin^2(X/3)用x趋向于0sinx/x=1怎么做lim(x→0)x^2/sin^2(X/3)用x趋向于0sinx/x=1怎么做lim(x

用x趋向于0 sinx/x=1 怎么做lim(x→0) x^2/sin^2(X/3)
用x趋向于0 sinx/x=1 怎么做lim(x→0) x^2/sin^2(X/3)

用x趋向于0 sinx/x=1 怎么做lim(x→0) x^2/sin^2(X/3)
sin^2怎么理解