直角三角形,已知两边,求第三边的角度直角三角形,已知两边长,一条边a值是2,3,4,5时,b边值是1,2,3,4,5,6,7,8,9时,直角边a和斜边C的夹角是多少度?,不要告诉我公式,a=2,b=1,2,3,4,5,6,7,8,9时,直角边a和斜边C的夹角是多少度?a=3,b=1,2,3,4,5,6,7,8,9时,直角边a和斜边C的夹角是多少度?a=4,b=1,2,3,4,5,6,7,8,9时,直角边a和斜边C的夹角是多少度?a=5,b=1,2,3,4,5,6,7,8,9时,直角边a和斜边C的夹角是多少度?a=1,b=1,2,3,4,5,6,7,8,9时,直角边a和斜边C的夹角是多少度?

a b 直角边a和斜边C的夹角（度）
1 1 45.0000
1 2 63.4349
1 3 71.5651
1 4 75.9638
1 5 78.6901
1 6 80.5377
1 7 81.8699
1 8 82.8750
1 9 83.6598
2 1 26.5651
2 2 45.0000
2 3 56.3099
2 4 63.4349
2 5 68.1986
2 6 71.5651
2 7 74.0546
2 8 75.9638
2 9 77.4712
3 1 18.4349
3 2 33.6901
3 3 45.0000
3 4 53.1301
3 5 59.0362
3 6 63.4349
3 7 66.8014
3 8 69.4440
3 9 71.5651
4 1 14.0362
4 2 26.5651
4 3 36.8699
4 4 45.0000
4 5 51.3402
4 6 56.3099
4 7 60.2551
4 8 63.4349
4 9 66.0375
5 1 11.3099
5 2 21.8014
5 3 30.9638
5 4 38.6598
5 5 45.0000
5 6 50.1944
5 7 54.4623
5 8 57.9946
5 9 60.9454

a = 1, c = 1角度是:0
a = 1, c = 2角度是:60
a = 1, c = 3角度是:70.5288
a = 1, c = 4角度是:75.5225
a = 1, c = 5角度是:78.463
a = 1, c = 6角度是:80.4059
a = 1, c = 7角度是:81.7868
a = 1, c = 8角度是:82.8192
a = 1, c = 9角度是:83.6206
a = 2, c = 2角度是:0
a = 2, c = 3角度是:48.1897
a = 2, c = 4角度是:60
a = 2, c = 5角度是:66.4218
a = 2, c = 6角度是:70.5288
a = 2, c = 7角度是:73.3985
a = 2, c = 8角度是:75.5225
a = 2, c = 9角度是:77.1604
a = 3, c = 3角度是:0
a = 3, c = 4角度是:41.4096
a = 3, c = 5角度是:53.1301
a = 3, c = 6角度是:60
a = 3, c = 7角度是:64.6231
a = 3, c = 8角度是:67.9757
a = 3, c = 9角度是:70.5288
a = 4, c = 4角度是:0
a = 4, c = 5角度是:36.8699
a = 4, c = 6角度是:48.1897
a = 4, c = 7角度是:55.1501
a = 4, c = 8角度是:60
a = 4, c = 9角度是:63.6122
a = 5, c = 5角度是:0
a = 5, c = 6角度是:33.5573
a = 5, c = 7角度是:44.4153
a = 5, c = 8角度是:51.3178
a = 5, c = 9角度是:56.251

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

a=2,b=1时候,设直角边a和斜边C的夹角是B,
则tanB=b/a=1/2
所以B=arctan1/2
由此可以知道角度统一为B=arctan(b/a)