2*cos(x)*atan(x)
(2*cos(x))*atan(x)
2*cos(x) -2*atan(x)*sin(x) + -------- 2 1 + x
/ 2*sin(x) 2*x*cos(x)\ -2*|atan(x)*cos(x) + -------- + ----------| | 2 2 | | 1 + x / 2\ | \ \1 + x / /
/ / 2 \ \ | | 4*x | | | 2*|-1 + ------|*cos(x) | | | 2| | | 3*cos(x) \ 1 + x / 6*x*sin(x)| 2*|atan(x)*sin(x) - -------- + ---------------------- + ----------| | 2 2 2 | | 1 + x / 2\ / 2\ | \ \1 + x / \1 + x / /