Finding the Direction Cosines
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Consider an arbitrary 3D vector: A=Axx+Ayy+Azz
a) Determine the direction cosines for this vector. These are cos[], cos[] and cos [], where  is the angle between A and x , where  is the angle between A and y, and  is the angle of A and z.
b) Show that the direction cosines obey the relationship (cos[])2+(cos[])2+(cos [])2.
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Solution Summary
The expert finds the direction cosines for vectors. The direction cosines obey in relationships are given.
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Consider an arbitrary 3D vector: A=Axx+Ayy+Azz
a) Determine the direction cosines for this vector. These are cos[], cos[] and cos [], ...
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