Предмет: Алгебра, автор: sofaartamonova68

помогите решить задание по тригонометрии​

Приложения:

Ответы

Автор ответа: alexdumler99
0

Ответ:

а) а > 1

б) a < -1

в) a < 1/2

г) a > \frac{\sqrt{3}}{2}

Объяснение:

а) при а строго больше 1, так как значения косинуса [-1;1]

б) при а строго меньше -1, так как значения косинуса [-1;1]

в) при а строго меньше 1/2, так как cos -\frac{\pi }{3} равно 1/2

г) при а строго больше \frac{\sqrt{3}}{2}, так как cos \frac{\pi }{6} равен \frac{\sqrt{3}}{2}

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