lim(x->0) (sin2x)/(tan2x)2/3

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lim(x->0) (sin2x)/(tan2x)2/3
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lim(x->0) (sin2x)/(tan2x)2/3
lim(x->0) (sin2x)/(tan2x)
2/3

lim(x->0) (sin2x)/(tan2x)2/3
lim(x→0)sin2x/tan2x=lim(x→0)cos2x=1
千真万确!

lim(x->0)(sin2x)/(tan2x)=lim(x->0)(cos2x)=1啊

lim(x→0)sin2x/tan2x=lim(x→0)cos2x=1

lim(x→0)sin2x/tan2x=lim(x→0)cos2x=1
千真万确!