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Тригонометрия !!! Приведите к значению тригонометрической функции наименьшего положительного аргумента
[tex]ctg \frac{21 \pi }{13}
\\ \\ cos \frac{8 \pi }{3} [/tex]-
Предмет:
Алгебра -
Автор:
clarencezavala - 6 лет назад
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Ответы 1
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ctg(2π-5π/13)=-ctg5π/13cos(3π-π/3)=cos(π-π/3)=-cosπ/3=-1/2
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Автор:
lidia93 - 6 лет назад
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0
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