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elnemiwar
@elnemiwar
August 2022
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Помогите!20 баллов!Объясните,пожалуйста,как это всё делать?
sin 315=?
tg(-4П/3)=?
cos 7П/3=?
ctg(29П/2)=?
Меня не было,теперь не понимаю
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sedinalana
Verified answer
Sin 315=sin(360-45)=-sin45=-√2/2
tg(-4П/3)=-tg4π/3=-tg(π+π/3)=-tgπ/3=-√3
cos 7П/3=cos(2π+π/3)=cosπ/3=1/2
ctg(29П/2)=ctg(14π+π/2)=ctgπ/2=0
3 votes
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Answers & Comments
Verified answer
Sin 315=sin(360-45)=-sin45=-√2/2tg(-4П/3)=-tg4π/3=-tg(π+π/3)=-tgπ/3=-√3
cos 7П/3=cos(2π+π/3)=cosπ/3=1/2
ctg(29П/2)=ctg(14π+π/2)=ctgπ/2=0