if e1=(1,1,1) and e2=(1,1,-1) and a and b are 2 vectors such that e1=2a+b and e2=a+2b then prove that the - Maths - Vector Algebra

Question

if e1=(1,1,1) and e2=(1,1,-1) and a and b are 2 vectors such that
e1=2a+b and e2=a+2b then prove that the angle between a and b is
cos-1(-7/11)

Varun.Rawat · Accepted Answer

Refer the following link :

https://www meritnation
com/ask-answer/question/a-i-j-k-and-i-j-k-the-angle-between-the-vectors-2a-b-and-a/vector-algebra/5479504

if e1=(1,1,1) and e2=(1,1,-1) and a and b are 2 vectors such that e1=2a+b and e2=a+2b then prove that the angle between a and b is cos-1(-7/11)