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Math Help - unit normal vector

  1. #1
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    unit normal vector

    find N in general and at t=0

    (e^tsint, e^t, e^tcos(t))

    so its T'/||T'|| but that not working can anyone help
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  2. #2
    MHF Contributor Bruno J.'s Avatar
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    Why is it "not working"? Show what you have done so we can help you.
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