Предмет: Алгебра, автор: muhammadjonovabdurah

попмогие друзья срочно

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Автор ответа: bena20193

0

Ответ:

Объяснение:

sinx - 1/sinx=-3 возведем в квадрат

(sinx - 1/sinx)²=(-3)²

sin²x - 2sinx*(1/sinx) + (1/sin²x)= 9

sin²x - 2 + (1/sin²x)= 9

sin²x + 1/sin²x= 9+2

sin²x + 1/sin²x= 11

sin²x + sin⁻²x= 11

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