Question

A = i + j . What is the angle between the vector and x-axis?

Answer 1

Hii dear,

# Answer- 45°

# Explaination-
Suppose,
- Given vector vectA = i + j
- X-axis vectX = i

Angle between 2 vectors is given by,
cosθ = (vectA.vectX)/(|A|×|B|)
cosθ = (i+j)(i)/(√2×1)
cosθ = 1/√2
θ = 45°

Hence, angle between vector A and X-axis is 45°.

Hope that solved your query...