lim(sin3x/tan4x)x趋向0
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lim(sin3x/tan4x)x趋向0lim(sin3x/tan4x)x趋向0lim(sin3x/tan4x)x趋向0sin3x/tan4x=﹙3/4﹚﹙sin3x/3x﹚﹙4x/tan4x﹚x趋于
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sin3x/tan4x=﹙3/4﹚﹙sin3x/3x﹚﹙4x/tan4x﹚
x趋于0时 等于3/4
lim (sin3x/tan4x)=lim (3/4) (sin3x/3x)/(tan4x/4x)=3/4
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