lim[t→0+](−2sin(6t)/sin(6t)+2tcos(6t))百思不得其解,求大神出手相助……

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lim[t→0+](−2sin(6t)/sin(6t)+2tcos(6t))百思不得其解,求大神出手相助……lim[t→0+](−2sin(6t)/sin(6t)+2tcos(

lim[t→0+](−2sin(6t)/sin(6t)+2tcos(6t))百思不得其解,求大神出手相助……
lim[t→0+](−2sin(6t)/sin(6t)+2tcos(6t))

百思不得其解,求大神出手相助……