Question

What is a $3$d angle?

Answer 1

3-d angle definition:

$3$-d angle means the angle formed by the lines in three-dimensional space.

Using the vectors in $3$-d, we can calculate the $3$-d angles.

Formula: The $3$-d angle between two vectors $\overrightarrow{A}$ and $\overrightarrow{B}$ is,

$\mathit{c}\mathit{o}\mathit{s}\mathit{\theta }\mathbf{=}\frac{\overrightarrow{\mathbf{A}}\mathbf{·}\overrightarrow{\mathbf{B}}}{\left|\overrightarrow{A}\right|\left|\overrightarrow{B}\right|}$ , where $\left|\overrightarrow{A}\right|$ and $\left|\overrightarrow{B}\right|$ are the magnitudes of the vectors.

Hence,3-d angle is explained