1. cos 3x - = 1. 3
2. sin2 x + 5 sin x + 4 = 0.
3. cos* x + 4 cos x + 3 = 0.
4. ctg x +
4 + 5 = 0.
ctgx
5. tg x - tg2 x + 2 tg x - 2 = 0.

tigr951    1   17.04.2020 13:34    5