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How do you find the coordinate of a vector with the unit vector?

  1. Feb 26, 2012 #1
    If you already have one of the two coordinates?
     
  2. jcsd
  3. Feb 26, 2012 #2

    Fredrik

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    If ##x=x_1e_1+x_2e_2## and you know the value of ##x_1##, you can get the value of ##x_2## from ##x_2e_2=x-x_1e_1##.

    Another option (if you understand inner products) is to just compute ##\langle e_2,x\rangle##.
     
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