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Homework Help: Vector componets / Kinematics

  1. May 23, 2006 #1
    For finding vextor componets for do i always us the sine to find y comp
    and cos for x -comp ???

    Also with kinematics when do i know which equation to use. Any tips or site with info would be great. This is my first post be gentle :tongue:
  2. jcsd
  3. May 23, 2006 #2
    You should spend a few minutes to learn what cos(x) and sin(x) means. Then you can apply that definition to the problem.

    In general, you cannot use cos(x) for the x component nor sin(y) for the y component.

    Your question shows me that you do not have a full understanding of cos(x) and sin(x).
  4. May 23, 2006 #3
    I did get that part (putting my head back in the book). I also think i am just getting really tired.

    sin - o/h

    cos - a/h

    I was looking at the angles wrong.
  5. May 24, 2006 #4
    thats right. it depends if the angle of the vector is given wrt the x or y axis
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