Помогите решиь даю 100 баллов
1)3sin(-П/2)-cos(-П)-3ctg(-П/4)
2)Постройте график
У=2sin(x+П)

3)а)3sin^2x-5sinx-2=0
в)5cos^2x+6sinx-6=0
4) Определите в какой четверти
-826°
5)10sin(-П/3)-5cos(-П/3)-6ctg^2(-П/3)
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