2 2 2 2 25*cos (x)*sin (y) + 25*cos (x)*cos (y)
(25*cos(x)^2)*sin(y)^2 + (25*cos(x)^2)*cos(y)^2 при y = 1
(25*cos(x)^2)*sin(y)^2 + (25*cos(x)^2)*cos(y)^2
(25*cos(x)^2)*sin((1))^2 + (25*cos(x)^2)*cos((1))^2
(25*cos(x)^2)*sin(1)^2 + (25*cos(x)^2)*cos(1)^2
25*cos(1)^2*cos(x)^2 + 25*cos(x)^2*sin(1)^2
2 2 2 2 25*cos (x)*cos (y) + 25*cos (x)*sin (y)
25.0*cos(x)^2*cos(y)^2 + 25.0*cos(x)^2*sin(y)^2
2 2 2 2 25*cos (x)*cos (y) + 25*cos (x)*sin (y)
2 / 2 2 \ 25*cos (x)*\cos (y) + sin (y)/
25 25*cos(2*x) -- + ----------- 2 2
2 / 2 2 \ 25*cos (x)*\cos (y) + sin (y)/
2 2 2 2 25*cos (x)*cos (y) + 25*cos (x)*sin (y)