e1[bar]=(1,1,1) : e2[bar]=(1,1,-1) a and b are 2 vectors such that e1=2a[bar] + 2b[bar] e2=a[bar] +2b[bar] then the angle b/w a and b is

e1[bar]=(1,1,1) : e2[bar]=(1,1,-1) a and b are 2 vectors such that e1

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