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Homework Help: Trouble with some vector problems

  1. Sep 18, 2004 #1
    A vector is given by R = 1.50 i + 2.50 j + 2.89 k

    Find the angle between R and the x, y, and z axis.

    How would I do this?
     
  2. jcsd
  3. Sep 18, 2004 #2

    arildno

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    1. What, in general, gives the angle between two vectors?
    2. Which vectors might you use to represent the axes?
     
  4. Sep 18, 2004 #3
    Well I tried tangent of y/x, and got the angle, but it turned out to be wrong
     
  5. Sep 18, 2004 #4

    arildno

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    Have you heard of one of these products?
    "dot product", "scalar product", "inner product"?
    (It's different names on the same "thing")
     
  6. Sep 18, 2004 #5
    lol well i have heard of a scalar product, not the other two however.
     
  7. Sep 18, 2004 #6

    arildno

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    They're other names for the scalar product.
    Now:
    How is the value of the scalar product between two vectors related to the angle between them?
     
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