Номер 609

Сравнить числа:

1) arctg (-1) и arcsin(-√3/2)

arctg (-1) = -Пи/4

arcsin(-√3/2) = -Пи/3

-Пи/4 > -Пи/3

2) arctg√3 и arccos1/2

arctg√3 = Пи/3

arccos1/2 = Пи/3

arctg√3 = arccos1/2

3) arctg(-3) и arctg2

arctg(-3) < 0

arctg2 > 0

arctg(-3) < arctg2

4) arctg(-5) и arctg0

arctg(-5) < 0

arctg0 > 0

arctg(-5) < arctg0