lim(sin 2x)/(tan 2x)极限多少 x→0 .
求极限lim(x-->0)x^2 sin(1/x),
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lim√(1+tan)-√1+sin a/[x√(1+sin^2x)-x x趋近0时的极限
求极限lim┬(x→0)〖(tanx-sinx)/ln(1+x^
求极限 lim sin(x^2 * sin (1/x))/x x->0
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求极限:lim x→0 ln[1+sin^2(x)]/[e^(x^2)-1]
求极限lim(x→0) sin(1-x)/(1-x^2)
求极限 lim(x→0){x[sin(1/x^2)-1/sin2x]}
lim x→0 (x∧2 cscx sin(1/x)) 求极限