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Math Help - Squeeze thrm

  1. #1
    Newbie
    Joined
    May 2010
    Posts
    15

    Squeeze thrm

    Lim x^2(cos20pix)
    x->0

    -x^2 <or equal to cos20pix<or equal to x^2

    Lim X^2=0
    X->0
    lim -x^2=0 -1<or equal to cospix<or equal to 1
    x->0

    lim x^2(cospix) =0.
    x->0

    Can someone check this and see if I did this right?
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  2. #2
    Junior Member
    Joined
    Oct 2009
    Posts
    35
    The working is right, but please be careful, because on the second line you dropped x^2 and by the end you had dropped the 20.
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  3. #3
    Newbie
    Joined
    May 2010
    Posts
    15
    Thanks! I'll be more careful, I didn't even realize I left those out.
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