September 2021 0 7 Report
 Нужно решить тригонометрические уравнения 1 2sin2 x + 11sin x cos x + 12cos2 x = 0

2 4 tg x – 14ctg x + 1 = 0

3 4sin 2x + 10cos2 x = 1

4 11sin 2x – 7cos 2x = 11
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