Предмет: Геометрия, автор: hopenope

помогите решить пример!
sin^2(19) + sin^2(-71)

Ответы

Автор ответа: kirichekov
2
sin²19+sin²(-71)+sin²19+(sin(-71))²=sin²19+sin²71=sin²19+sin²(90-19)=sin²19+cos²19=1
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