Alg2 Question: Matrix Rotations

Pre-College Topics High School Life
1

<p>Hey, </p>

<p>Quick question: How do you guys remember the matrices for each rotation? </p>

<p>For example, for a rotation of 90 degrees, or -270 is:
[0 -1]
[1 0] </p>

<p>For 180 and -180 its:
[-1 0]
[0 -1]</p>

<p>For 270 or -90 its:
[0 1]
[-1 0]</p>

<p>How do you remember these matrices, along with other matrices? Whats the logic to them?</p>

2

<p>It just takes time to memorize. Keep working with them and in time you’ll start memorizing and recognizing them.</p>