Предмет: Математика, автор: kiramayak

Как это решить?Помогите пожалуйста!Если можно подробно

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Автор ответа: kirido

Через основное тригонометрическое тождество:
1=cos^2 + sin^2
sin = √1 - cos^2 = √1 - ((2√6)/5)^2 = √1/25 = 1/5
Теперь со знаком: угол находится в 4 четверти, значит синус будет отрицательным
sin = -1/5

Автор ответа: kiramayak

Спасибо огромное!!!)

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