ВK
Владислав Kaban
tga=x
tgb =y
x+y =5/6
x*y =1/6 ------> x =1\(6y); 1/(6y)+y =5/6 |умножим на y
1/6+y*y-5y/6=0 решаем квадратное уравнение
y1 =1/3 x1=1/2
y2 =1/2 x2=1/3
далее a =arctg (1/2) b =arctg(1/3)
или a =arctg (1/3) b =arctg(1/2)