Задание 15.1

15.1. Решите уравнение: 1) cos x = 1 2 2) cos x = 2 2 3) cos x = 3 2 4) cos x = 1 3.

Answers

1)

cos x = 1 2

x = ±arccos 1 2 + 2πn

x = ±π 3 + 2πn,n

2)

cos x = 2 2

x = ±arccos 2 2 + 2πn,n

x = ±π 4 + 2πn,n

3)

cos x = 3 2

x = ±arccos (3 2 ) + 2πn

x = ±5π 6 + 2πn,n

4)

cos x = 1 3

x = ±arccos 1 3 + 2πn,n

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2021-11-24 12:49
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