CBSE Class 12-science Answered
if a,b,c are three non parallel unit vectore, such that a x (b x c)=1/2b ,find the angles
Asked by | 20 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 | 20 Feb, 2009, 07:56: PM
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