# Find the angle be

Given.

Let the angle between vectors and be θ.

We know the cross product of two vectors and forming an angle θ is

where is a unit vector perpendicular to and

is a unit vector

We also have the dot product of two vectors and forming an angle θ is

But, it is given that

sin θ = cos θ

tan θ = 1

Thus, the angle between two vectors is.

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