보아스 물리수학 3.7 문제24번풀이

[양자역학공부(vanish1771)]

Mary Layne Boas, Mathematical Methods in the Physical Sciences 3rd edition (Wiley, 2005)

Chapter 3. Linear Algebra

Section 7. Linear Combinations, Linear Functions, Linear Operators

Let the matrix represent an active transformation of vectors in the (x, y) plane (axes fixed, vectors rotated or reflected). Show that the matrix is orthogonal, find its determinant, and find the rotation angle, or find the line of reflection.

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It's easy, simple, straightforward, effortless, uncomplicated, undemanding, not difficult.