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Finding theta angle.should be easy one.

  1. Feb 11, 2009 #1
    finding theta angle.........should be easy one.

    1. The problem statement, all variables and given/known data

    if your given theta (as pointed out by the arrow with #1), how do you know the #2 arrow angle is the same?

    2. Relevant equations

  2. jcsd
  3. Feb 11, 2009 #2


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    Re: finding theta angle.........should be easy one.

    Continue the vertical line marking one side of the angle you label 2 down until it meets the horizontal line that is A sub x extended. Now you have a right triangle. Notice that N sub B is perpendicular to the bar. The interior angles of the triangle add up to 90 and the theta you call 2 plus the upper interior angle add to 90 so the two thetas have to be equal.

    Is that clear?
  4. Feb 11, 2009 #3
    Re: finding theta angle.........should be easy one.

    wickd!!! got it...

    thankx, cheers!!
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