If the even function y = f (x) decreases monotonically in the interval [0,4], then a f (- 1) > F (one third) > F (- 1) > b f (one third) > F (- 1) > F (- 1) > C f (- 1) > F (one third) > d f (- 1) > F (- 1) > F (one third) > F (one third)

If the even function y = f (x) decreases monotonically in the interval [0,4], then a f (- 1) > F (one third) > F (- 1) > b f (one third) > F (- 1) > F (- 1) > C f (- 1) > F (one third) > d f (- 1) > F (- 1) > F (one third) > F (one third)

The even function y = f (x) decreases monotonically in the interval [0,4]
So it increases monotonically in the interval [- 4,0]
Monotonically increasing on interval [- 4,0]
So f (- 1) > F (- π / 3) > F (- π)
Monotone decreasing on interval [0,4]
So f (1) > F (π / 3) > F (π)
Even function
So f (1) = f (- 1) f (π / 3) = f (- π / 3)
F (- 1) > F (π / 3) > F (- π)
In fact, we can also observe the image
It can be judged by increasing on the left and decreasing on the right
The farther away from the axis of symmetry, the smaller the value of the function