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Let a,b,c be vectors such that a×b=(111),a×c=(121), and b×c=(023)
Then evaluate (b+c)×b,a×(b+4a),(a+b+c)×a
 

 Oct 30, 2020
 #2
avatar+33654 
+3

For cross products we have the following
 

a x a = 0  (simiarly for b x b etc)

 

a x b = - b x a   etc.

 

(b + c) x a = b x+  c x a   =   -x b  -  a x c    etc.

 

Can you take it from here?

 Oct 30, 2020
 #3
avatar+118696 
+1

Thanks Alan, that sure made it easy laugh

 Oct 31, 2020

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