Question

◦•●◉✿HEY MATES✿◉●•◦
I'm actually not getting a clear calculation for this question.
Can you guys please help me?
⏩Do solve it step wise. ​

Answer 1

let a = i
b = i + j + k

a.b = 1
=> 1.√3.cos@ = 1
=> cos@ = 1/√3

so , OPTION A

(use dot product)

Answer 2

Explanation:

A vector =i^

B vector =i^+j^+k^

A vector×B vector=1

[(1)^1/2]×[(1+1+1)^1/2cos θ]=1

(1^1/2)×3^1/2 cosθ=1

1×√3cosθ=1

θ=cos^-1(1/√3)

It is cross product

Option A is answer