 artemstepanyuk 
                                                14.09.2020 22:51
                                                
                                                artemstepanyuk 
                                                14.09.2020 22:51
                                             elenshv 
                                                14.09.2020 22:29
                                                
                                                elenshv 
                                                14.09.2020 22:29
                                             vvashr 
                                                13.09.2020 22:13
                                                
                                                vvashr 
                                                13.09.2020 22:13
                                             nadia6191 
                                                14.09.2020 22:52
                                                
                                                nadia6191 
                                                14.09.2020 22:52
                                             прокопов 
                                                24.05.2020 12:51
                                                
                                                прокопов 
                                                24.05.2020 12:51
                                             Apsalikovat 
                                                24.05.2020 12:51
                                                
                                                Apsalikovat 
                                                24.05.2020 12:51
                                             ultraomegaus 
                                                25.05.2020 13:25
                                                
                                                ultraomegaus 
                                                25.05.2020 13:25
                                             niki1232018ovv1ej 
                                                25.05.2020 13:25
                                                
                                                niki1232018ovv1ej 
                                                25.05.2020 13:25
                                             Nar43 
                                                03.09.2019 13:33
                                                
                                                Nar43 
                                                03.09.2019 13:33
                                            
2x = 5π/9 +πn
x = 5π/18 + πn/2
n∈Z
2) x/5 + π/12 = π/2 + 2πn
x/5 = 5π/12 + 2πn
x = 25π/12 + 10πn
n∈Z