Question

find angle between two vectors a= 2i + j - k and b= i - k ​

Answer 1

Step-by-step explanation:

Angle between vectors A and B is cos(theta) A.B/|A||B|

A•B=2×1+(-1×-1)=2+1=3

|A|=√6,|B|=√2

Cos(theta)=3/√2√6=3/√12=3/2√3=√3/2

cos(theta)=√3/2=cos30°

Therefore angle between the vectors is 30°

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