sin(2x+3x)*cos2x-sin3x=0sin2xcos3x*cos2x+sin3xcos2x*cos2x-sin3x=0sin2xcos3x*cos2x+sin3x*(cos²2x-1)=0sin2xcos3xcos2x-sin3x*sin²2x=0sin2x*(cos3xcos2x-sin3xsin2x)=0sin2x*cos5x=0sin2x=0 U cos5x=02x=πk,k∈z U 5x=π/2+πk,k∈zx=πk/2,k∈z U x=π/10+πk/5,k∈z2014π≤πk/2≤2015 4028≤k≤4030k=4028,4029,4030 3 решения2014≤π/10+πk/2≤201520140≤1+5k≤2015020139≤5k≤201494027,5≤k≤4029,5k=4028,4029 2решенияОтвет 5 корней