❗ Решите задачи 8 клас​!

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