Solution
= Solution
The reversed product is the <dot product>, a scalar represented by a $1\times1$ <matrix>:
$$
\boxed{\mathbf n^T\mathbf n=n_1^2+n_2^2.}
$$
= Solution
The reversed product is the <dot product>, a scalar represented by a $1\times1$ <matrix>:
$$
\boxed{\mathbf n^T\mathbf n=n_1^2+n_2^2.}
$$