Решите уравнения  1)sin2x+sin4x=0 2)cos3x-cos5x=0  3)sin3x+cos3x=0 решите хоть один плиз))    

1) sin2x + 2sin2x*cos2x = 0 sin2x ( 1 + 2 cos2x) = 0 sin2x = 0                           или            1 + 2cos2x =0 2x = (-1)^n * П/2 +2Пn                        cos2x = -1/2 x = (-1)^n * П/4 +Пn                            2x = +- * 2П/3 + 2П/n                                                           x = +- * п/3 + Пn   3) sin3x+cos3x=0 / cos3x не равн. 0 tg3x + 1 = 0 tg3x = -1 3x = -П/4 + Пn x = -П/12 + П/3n