Question

2cosx-1=0 решить уравнение

Answer 1

2cos(x)-1=0cos(x)=1/2x = +-arccos(1/2)+2πn, n∈Zx = +-π/3+2πn, n∈ZОтвет: x = +-π/3+2πn, n∈Z 

Answer 2

Ой вот

Answer 3

2cos(x)-1=0
cos(x)=1/2
x = +-arccos(1/2)+2πn, n∈Z
x = +-π/3+2πn, n∈Z
Ответ: x = +-π/3+2πn, n∈Z