Найдите корни уравнения , принадлежащие данному промежутку 1)tg2φ =1 , φ ∈ [-П; П]
2)sin2φ =0, φ ∈ [0; 2П]
3)cos2φ=0, φ ∈[-2П; 2П]
4)cos2φ=-1, φ ∈[-3П; 0]
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