(4x/57) +46 -89*sine(45 deg) +kosine(x)=0... (4x/57) +46 -89*(0.707106781)+kosine(x)=0... (4x/57) +46 -62.93250353+kosine(x)=0... (4x/57) -16.93250353 +kosine(x)=0... 0.070175438x +kosine(x) -16.93250353=0... me du this bi tri & tri agin... note that abs(kosine)