1) cos B = 12/15 = 4/5
tg A = 12/9 = 4/3
2) sin P = 15/17
cos M = 15/17
3)tg D = 12/16 = 6/8
sin E = 16/20 = 8/10
cos D = 16/20 = 8/10
4)sin A = 24/26 = 12/13
cos A = 10/26 = 5/13
tg A = 24/10 = 12/5
5)tg D = 16/8 = 2
tg C = 8/16 = 1/2
6) 17 * 17 = 17 * 17 + 16 * 16 - 2 * 16 * 17 * cos A
cos A = (16 * 16) / (2 * 16 * 17) = 8/17
cos B = cos A = 8/17
1) cos B = 12/15 = 4/5
tg A = 12/9 = 4/3
2) sin P = 15/17
cos M = 15/17
3)tg D = 12/16 = 6/8
sin E = 16/20 = 8/10
cos D = 16/20 = 8/10
4)sin A = 24/26 = 12/13
cos A = 10/26 = 5/13
tg A = 24/10 = 12/5
5)tg D = 16/8 = 2
tg C = 8/16 = 1/2
6) 17 * 17 = 17 * 17 + 16 * 16 - 2 * 16 * 17 * cos A
cos A = (16 * 16) / (2 * 16 * 17) = 8/17
cos B = cos A = 8/17