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Vectors and the trigonometric function

  1. Apr 1, 2007 #1
    Hey i'm just having trouble with this question

    Two vectors have magnitudes of 10 and 15. The angle between them when they are drawn with their tails at the same point is 65 deg. The component of the longer vector along the line perpendicular to the shorter vector, in the plane of the vectors, is:

    a)0
    b)4.2
    c)9.1
    d)13.6
    e)6.3

    Thanks Nath
     
  2. jcsd
  3. Apr 1, 2007 #2
    dear Nath , i think you can solve it by trigonometric function.

    which step you are not clear,or you just can't sure whether the right answer is in the abcde.
     
  4. Apr 1, 2007 #3
    i'm unsure where to start

    Nath
     
  5. Apr 1, 2007 #4
    i just worked it out...i sketched the picture and used trigonometry

    sin65° = x/15

    Therefore: .x = 15·sin65° ≈ 13.6
     
  6. Apr 1, 2007 #5
    clever guy. i knew you can do it
     
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