6sina - 4cosa=8sina-16cosa
12cosa=2sina
6cosa=sina
sina/cosa=6, tga=6
3.6=3.6/10=3.3/5
10.7/11-n=3.3/5
n=10.7/11-3.3/5
n=7.2/55
проверка:
10.7/11-7.2/55=3.33/55=3.3/5=3.6(10/5*2)
3х-42=х-66
3х-х=-66+42
2х=-24
х=-24/2
х=-12
23030|49
196 470
343
-343
0