if a,b,c are three non parallel unit vectore, such that a x (b x c)=1/2b ,find the angles

Asked by  | 20th Feb, 2009, 05:37: PM

Expert Answer:

as we know A  B = ab cos θ  where a and b is magnitude

so for above eqn we have  abc cos θ = b /2 as a,b,c are unit vectors so we have  cos θ = 1/ 2 ==> θ = 60

Answered by  | 20th Feb, 2009, 07:56: PM

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