Решите уравнение 1/tg2x – 1/sinx = 1
1/tg2x – 1/sinx = 1 Cos^2 x/ Sin^2 x - 1/ Sin x = 1 Cos^2x/Sin^2x - Sin x / Sin^2 x - Sin^2 x/ Sin^2 x= 0 Cos ^2 x - Sin x - Sin^2 x = 0
Замени сos2x через sin2x