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Bergamotte
@Bergamotte
July 2022
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При каком значении острого угла α значение выражения sin (30° + α) + cos 150° · sin α равно 0,25?
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yugolovin
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Ответ:
3 votes
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iosiffinikov
Легко получить, что выражение равно0,5*cos(alfa). Значит alfa=60 градусов.
Проверяем: sin(90)-3/4=0,25
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Verified answer
Ответ:
Проверяем: sin(90)-3/4=0,25