Подстановка условия
[src](sin(a) + sin(5*a))/(cos(a) + cos(5*a)) при a = 1
(sin(a) + sin(5*a))/(cos(a) + cos(5*a))
$$\frac{\sin{\left (a \right )} + \sin{\left (5 a \right )}}{\cos{\left (a \right )} + \cos{\left (5 a \right )}}$$
(sin((1)) + sin(5*(1)))/(cos((1)) + cos(5*(1)))
$$\frac{\sin{\left ((1) \right )} + \sin{\left (5 (1) \right )}}{\cos{\left ((1) \right )} + \cos{\left (5 (1) \right )}}$$
(sin(1) + sin(5))/(cos(1) + cos(5))
$$\frac{\sin{\left (5 \right )} + \sin{\left (1 \right )}}{\cos{\left (5 \right )} + \cos{\left (1 \right )}}$$
(sin(1) + sin(5))/(cos(1) + cos(5))
$$\frac{\sin{\left (5 \right )} + \sin{\left (1 \right )}}{\cos{\left (5 \right )} + \cos{\left (1 \right )}}$$
sin(a) sin(5*a)
----------------- + -----------------
cos(a) + cos(5*a) cos(a) + cos(5*a)
$$\frac{\sin{\left (a \right )}}{\cos{\left (a \right )} + \cos{\left (5 a \right )}} + \frac{\sin{\left (5 a \right )}}{\cos{\left (a \right )} + \cos{\left (5 a \right )}}$$
5 2 3 4
sin (a) - 10*cos (a)*sin (a) + 5*cos (a)*sin(a) + sin(a)
--------------------------------------------------------
5 3 2 4
cos (a) - 10*cos (a)*sin (a) + 5*sin (a)*cos(a) + cos(a)
$$\frac{\sin^{5}{\left (a \right )} - 10 \sin^{3}{\left (a \right )} \cos^{2}{\left (a \right )} + 5 \sin{\left (a \right )} \cos^{4}{\left (a \right )} + \sin{\left (a \right )}}{5 \sin^{4}{\left (a \right )} \cos{\left (a \right )} - 10 \sin^{2}{\left (a \right )} \cos^{3}{\left (a \right )} + \cos^{5}{\left (a \right )} + \cos{\left (a \right )}}$$