1)sin13x=1/2
2)2tg13x=-1
3)cos(13x+П)=-1
4)2(13+3)sin^2x-(13+5)sin13+1=0
5)cos(13x+П/2)=0
6)2(13+2)cos^2x+13cosx-1=0
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lystuchaanna20    3   04.12.2020 10:45    2