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    Given vectors u=(1,1,1) v=(2,3,4) and w=(-2,0,2)

    find the angle v makes with the positive x-axis (in radians)

    Can anyone help? :confused:
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    hi
    you basically want the angle between 2 vectors

    you know vector v, now just choose a vector in the direction of +x axis ..e.g. (1,0,0).

    Now just use the scalar product....
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    The positive x-axis is the vector (1, 0, 0). Now use the dot (scalar) product.
 
 
 
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