Final answer:
There appears to be a mismatch between the student's question concerning orthogonal transformations and the provided reference material involving kinematic equations. Correct information on linear algebra and transformation matrices is needed to answer the question.
Step-by-step explanation:
The student's question seems to be related to a transformation in three-dimensional space, specifically concerning the invariance of a plane under such a transformation. However, the material provided is inconclusive and appears to be irrelevant to the student's question about orthogonal transformations. It seems there may be a mismatch between the student's question and the reference material, as the references discuss kinematic equations instead of invariant planes under a transformation. It is essential to provide the correct context and equations related to orthogonal transformations and invariant planes to appropriately answer the student's question. With the correct information, we could delve into linear algebra concepts, including eigenvectors, eigenvalues, and transformation matrices, to find which vectors are left unchanged by the transformation T.