求lim┬(x→0)〖x^2+x-tanx/xsinx
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求lim┬(x→0)〖x^2+x-tanx/xsinx
求lim┬(x→0)〖x^2+x-tanx/xsinx
求lim┬(x→0)〖x^2+x-tanx/xsinx
lim(x→0) (x^2+x-tanx)/(xsinx)
=lim(x→0) (x^2+x-tanx)/(x^2)
=lim(x→0) 1+(x-tanx)/(x^2)
=lim(x→0) 1+(1-cosx)/(2x)
=1