Предмет: Геометрия, автор: Iraevaskolnskaya001

СПАСИТЕЕЕЕЕ, ПРОШУ. ПОМОГИТЕ!!!!
ДАМ 45 БАЛЛОВ ​

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Автор ответа: svetlanavaslarionova
1

Ответ:

(1-Sin²α)/Cos²α-Sin²α=Cos²α/Cos²α-Sin²α=1-Sin²α=Cos²α

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