1 вариант sin(alpha-beta)-sin(пи/2-alpha)*sin(-beta)
sin(alpha)*cos(beta)
(sin(beta+alpha)-sin(beta-alpha))/2
2 вариант sin(alpha-beta)-sin(пи/(2-alpha))*sin(-beta)
(-cos(alpha)-sin(пи/(alpha-2)))*sin(beta)+sin(alpha)*cos(beta)
sin(alpha)*cos(beta)-(cos(alpha)+sin(пи/(alpha-2)))*sin(beta)
(cos(alpha*beta/(alpha-2)-2*beta/(alpha-2)+пи/(alpha-2))-cos(alpha*beta/(alpha-2)-2*beta/(alpha-2)-пи/(alpha-2))-2*sin(beta-alpha))/2
1 вариант sin(alpha-beta)-sin(пи/2-alpha)*sin(-beta)
sin(alpha)*cos(beta)
(sin(beta+alpha)-sin(beta-alpha))/2
2 вариант sin(alpha-beta)-sin(пи/(2-alpha))*sin(-beta)
(-cos(alpha)-sin(пи/(alpha-2)))*sin(beta)+sin(alpha)*cos(beta)
sin(alpha)*cos(beta)-(cos(alpha)+sin(пи/(alpha-2)))*sin(beta)
sin(alpha)*cos(beta)-(cos(alpha)+sin(пи/(alpha-2)))*sin(beta)
(cos(alpha*beta/(alpha-2)-2*beta/(alpha-2)+пи/(alpha-2))-cos(alpha*beta/(alpha-2)-2*beta/(alpha-2)-пи/(alpha-2))-2*sin(beta-alpha))/2