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Math Help - Calculus 3 help!

  1. #1
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    Calculus 3 help!

    Let P and Q be two arbitrary points. Apply on their coodinates the rotation matrix (cos theta, -sin theta // sin theta, cos theta) to obtain new points, P' and Q'. Show that ||P - Q|| = ||P' - Q'||


    note: the // in the matrix represents a new row, it's a two by two matrix.


    Help would be greatly appreciated!
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  2. #2
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    Hello,
    Quote Originally Posted by Drumiester View Post
    Let P and Q be two arbitrary points. Apply on their coodinates the rotation matrix (cos theta, -sin theta // sin theta, cos theta) to obtain new points, P' and Q'. Show that ||P - Q|| = ||P' - Q'||


    note: the // in the matrix represents a new row, it's a two by two matrix.


    Help would be greatly appreciated!
    What do ||.|| stand for ? Which norm is it ?
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  3. #3
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    The || respresents length (as in vector length)
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