23.2.Есептеңдер
1)sin225°
2)sin330°
3)соs210°
4)tg225°
5)cos120°
6)ctg150°
1)sin225°
2)sin330°
3)соs210°
4)tg225°
5)cos120°
6)ctg150°
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Answers & Comments
Ответ: 1)sin225°=sin(-135)=-sin135=-sin(90+45)=0,5*√2
2)sin330°=sin(-30)=-1/2
3)соs210°=cos(180+30)=-0,5*√3
4)tg225°=tg(225-180)=tg45=1
5)cos120°=cos(90+30)=-0,5
6)ctg150°=ctg(-30)=-√3
Объяснение: