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if r=l(bxc)+m(cxa)+n(axb) and [abc] = 2 then l+m+n is equal to r,a,b,c are vectors And ans is 1/2r(a+b+c)

if r=l(bxc)+m(cxa)+n(axb) and [abc] = 2 then l+m+n is equal to
 
r,a,b,c are vectors
 
And ans is 1/2r(a+b+c)

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1 Answers

Arun
25750 Points
5 years ago
Dear student
 
Dot product by a
 
r.a = 2l
 
Hence l = r.a /2
 
Similarly m = r.b/2
n = r.c /2
 
Hence
 
l+m+n = 1/2 (a+b+c) .r

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