Предмет: Алгебра, автор: Аноним

СРОЧНО!!!
Очень надо, помогите

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Автор ответа: irinan2014
0
Решение дано на фото.
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Автор ответа: Shatunchik16
0
cos(П/2-t)*ctg(-t)/sin(П/2+t)=-cost*(-ctg)/cost=ctgt
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