Предмет: Алгебра, автор: irishkarobl13

Упростите выражение

\frac{1-sin^{2}a}{1-cos^{2}a} *sin^{2} a

Ответы

Автор ответа: bena20193
2

Ответ:

Объяснение:

1-sin²a=cos²a ; 1-cos²a=sin²a

(1-sin²a)sin²a/(1-cos²a)= cos²a*sin²a/sin²a=cos²a

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