How to find acute angle between two intersecting lines in vector form?

When two lines intersect we can determine the acute angle by using the formula of cosine θ equal to scalar product of two vectors divided by product of their length.

How to find the acute angle formed by the intersection of the vectors for 3-6i and 5+3i - Quora

IBHL- Vectors - angle between 2 lines in 3D

Question 12 - Find angle between planes r.(2i + 2j - 3k) = 5

Angle between two curves

Angle - Wikipedia

How to Find the Angle Between Two Vectors: Formula & Examples

An Overview on the Angle of Intersection

Angle between a Line and a Plane: Formulas, Equation, Videos, Examples

Vectors. - ppt download

How to find the acute angle between the curves — Krista King Math

Lesson Explainer: Angle between Two Straight Lines in the Coordinate Plane