回複：Yes. Do you have a fast and easy way to explain it?

來源: 於 2009-12-30 18:42:54 [舊帖] [給我悄悄話] 本文已被閱讀：次

x c-63-t -x+t+63

c-t-47 t 47

x+t-63 63 -x+c-t

The sum of first column : x+c-t-47+x+t-63=c we get x=55.

If we know linear algebra well, We can let t=c=0 and get a rotational matrix: 55 -63 8
-47 0 47
-8 63 -55
Good luck. Happy new Year.