VectorHard

Question

Let and be three non-zero vectorssuch that is a unit vector perpendicular to both the vectors and If the angle between and is , then is equal to

Options

A.0
B.1
C. (a12 + a22 + a32)(b12 + b22 + b32)
D. (a12 + a22 + a32)(b12 + b22 + b32)(c12 + c22 + c32)

Solution

Since,
     
     
∵     is perpendicular to both and and is also a unit vector perpendicular to both and ....
∵    
       

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