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missdianazoo
@missdianazoo
July 2022
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Даю 21 балл! Помогите с тригонометрией!:(
Выразите sina, cosa и ctga, через tg a/2
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Answers & Comments
Lebensinhalt
Sin a = 2tg(a/2)/ 1+tg²(a/2)
cos a = 1-tg²(a/2)/ 1+tg²(a/2)
ctg a = 1-tg²(a/2)/ 2tg(a/2)
Вроде бы так, если правильно помню.
2 votes
Thanks 5
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Answers & Comments
cos a = 1-tg²(a/2)/ 1+tg²(a/2)
ctg a = 1-tg²(a/2)/ 2tg(a/2)
Вроде бы так, если правильно помню.