trygonometria
asia: tgx+ctgx=2
to (tg2x+ctg2x)3=?
5 mar 19:54
Trivial:
tgx + ctgx = 2 /2 ↓= 1
tg2x + ctg2x + 2tgxctgx = 2
tg2x + ctg2x = 0 /3
(tg2x + ctg2x)3 = 0.
5 mar 19:58
Trivial:
tgx + ctgx = 2 /
2
tg
2x + ctg
2x + 2tgxctgx =
4
tg
2x + ctg
2x = 2 /
3
(tg
2x + ctg
2x)
3 = 8.
5 mar 20:00
asia: dzięki
5 mar 20:04