Math-Calc

The lim as x goes to 0- for cos(x)/sin(x). I know the answer is negative infinity but I don't really understand why.

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  1. sin(-0.000000001)=-0.000000001
    cos(-0.000000001)=0.999999999
    sin/cos=-999999999

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  2. I mean
    cos(-0.000000001)/sin(-0.000000001)=
    =-999999999

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