sin((n + 1)*x) sin((1 - n)*x) -------------- + -------------- 2*(n + 1) 2*(1 - n)
sin((n + 1)*x)/(2*(n + 1)) + sin((1 - n)*x)/(2*(1 - n)) при x = -1/3
sin((n + 1)*x)/(2*(n + 1)) + sin((1 - n)*x)/(2*(1 - n))
sin((n + 1)*(-1/3))/(2*(n + 1)) + sin((1 - n)*(-1/3))/(2*(1 - n))
sin((n + 1)*(-1)/3)/(2*(n + 1)) + sin((1 - n)*(-1)/3)/(2*(1 - n))
sin(-1/3 + n/3)/(2 - 2*n) - sin(1/3 + n/3)/(2 + 2*n)
sin(x*(1 - n)) sin(x*(1 + n)) -------------- + -------------- 2 - 2*n 2 + 2*n
sin((n + 1)*x)/(2.0 + 2.0*n) + sin((1 - n)*x)/(2.0 - 2.0*n)
-2*sin(x + n*x) + 2*sin(-x + n*x) + 2*n*sin(x + n*x) + 2*n*sin(-x + n*x) ------------------------------------------------------------------------ (-2 + 2*n)*(2 + 2*n)
(1 + n)*sin(x*(1 - n)) + (1 - n)*sin(x*(1 + n)) ----------------------------------------------- 2*(1 + n)*(1 - n)
(1 + n)*sin(x*(-1 + n)) + (-1 + n)*sin(x*(1 + n)) ------------------------------------------------- 2*(1 + n)*(-1 + n)
sin(-x + n*x) sin(x + n*x) ------------- + ------------ -2 + 2*n 2 + 2*n
-sin(x + n*x) + n*sin(x + n*x) + n*sin(-x + n*x) + sin(-x + n*x) ---------------------------------------------------------------- 2 -2 + 2*n
1 1 ---------*sin((1 - n)*x) + ---------*sin((n + 1)*x) 2*(1 - n) 2*(n + 1)
-sin(x + n*x) + n*sin(x + n*x) + n*sin(-x + n*x) + sin(-x + n*x) ---------------------------------------------------------------- 2*(1 + n)*(-1 + n)