F(x+ 1)=-F(x), and it is a increasing function on [-3, -2], which means that f (x) is a decreasing function on 0, 1.

Explanation: -f(x)=f(x+ 1)=-f(x+2) gives f(x)=f(x+2).

Because it is increasing function in [-3, -2], it is increasing function in-1 0.

Because f(x) is an even function, it can be seen that f(x) is a decreasing function at 0, 1

A and b are acute angles and acute triangles, so 0.

0 & ltb & lt90

Then 90-b

sin(90-b)& lt； COSB of Sina

The second question:

And set solution (y0)y=2(x+ (x0)) and y? =4x

Get the square of y -2*y0*y+4x0=0.

Find the square of "Daita": 4y0-16x0.

Meaning: y? The point M(x0, y0) of & lt4x is in a parabola.

The tower is less than 0, so there is no intersection ~