Ребят помогите решить срочно
1.Решите уравнение: а)2 cos⁡x+√3=0; б)sin⁡〖(2x-π/3〗)+1=0 [4]
2.Решите уравнение 5sin2x-2sinxcosx + cos2x = 4
3. Решите неравенство:sin (4x+ π/6)>√2/2. .
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