What is the angle between the vector and the x-axis?

Given : the vector

To find : angle between the vector and the x-axis

Formula used : If the vector l + m + n and x-axis then the angle between the

lines ‘θ’ is given by

θ =

Here l = 4 , m = 8 , n = 1

θ = =

θ = =

θ =

The angle between the vector and the x-axis is