a = 1,b = 1时,a和c的夹角角度是:45
a = 1,b = 2时,a和c的夹角角度是:63.4349
a = 1,b = 3时,a和c的夹角角度是:71.5651
a = 1,b = 4时,a和c的夹角角度是:75.9638
a = 1,b = 5时,a和c的夹角角度是:78.6901
a = 1,b = 6时,a和c的夹角角度是:80.5377
a = 1,b = 7时,a和c的夹角角度是:81.8699
a = 1,b = 8时,a和c的夹角角度是:82.875
a = 1,b = 9时,a和c的夹角角度是:83.6598
a = 2,b = 1时,a和c的夹角角度是:26.5651
a = 2,b = 2时,a和c的夹角角度是:45
a = 2,b = 3时,a和c的夹角角度是:56.3099
a = 2,b = 4时,a和c的夹角角度是:63.4349
a = 2,b = 5时,a和c的夹角角度是:68.1986
a = 2,b = 6时,a和c的夹角角度是:71.5651
a = 2,b = 7时,a和c的夹角角度是:74.0546
a = 2,b = 8时,a和c的夹角角度是:75.9638
a = 2,b = 9时,a和c的夹角角度是:77.4712
a = 3,b = 1时,a和c的夹角角度是:18.4349
a = 3,b = 2时,a和c的夹角角度是:33.6901
a = 3,b = 3时,a和c的夹角角度是:45
a = 3,b = 4时,a和c的夹角角度是:53.1301
a = 3,b = 5时,a和c的夹角角度是:59.0362
a = 3,b = 6时,a和c的夹角角度是:63.4349
a = 3,b = 7时,a和c的夹角角度是:66.8014
a = 3,b = 8时,a和c的夹角角度是:69.444
a = 3,b = 9时,a和c的夹角角度是:71.5651
a = 4,b = 1时,a和c的夹角角度是:14.0362
a = 4,b = 2时,a和c的夹角角度是:26.5651
a = 4,b = 3时,a和c的夹角角度是:36.8699
a = 4,b = 4时,a和c的夹角角度是:45
a = 4,b = 5时,a和c的夹角角度是:51.3402
a = 4,b = 6时,a和c的夹角角度是:56.3099
a = 4,b = 7时,a和c的夹角角度是:60.2551
a = 4,b = 8时,a和c的夹角角度是:63.4349
a = 4,b = 9时,a和c的夹角角度是:66.0375
a = 5,b = 1时,a和c的夹角角度是:11.3099
a = 5,b = 2时,a和c的夹角角度是:21.8014
a = 5,b = 3时,a和c的夹角角度是:30.9638
a = 5,b = 4时,a和c的夹角角度是:38.6598
a = 5,b = 5时,a和c的夹角角度是:45
a = 5,b = 6时,a和c的夹角角度是:50.1944
a = 5,b = 7时,a和c的夹角角度是:54.4623
a = 5,b = 8时,a和c的夹角角度是:57.9946
a = 5,b = 9时,a和c的夹角角度是:60.9454
