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Math Help - Need help constructing a vector

  1. #1
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    Need help constructing a vector

    Hello There

    I have two existing vectors. I wish to construct a third vector which is in the same plane as the existing 2 vectors, and makes a specific angle with one of them. What method could I use to do this?
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  2. #2
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    Re: Need help constructing a vector

    If we call your two vectors u and v then the vector you want will be u + a v with a chosen to achieve the required angle. You can use the scalar product u . ( u + a v ) to help you.
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