There is a constant angle coordinate system, and T is the moving point on the x axis

I thought about the general process.

1.The t coordinate of the point is (a,0), where a>6

2.The l equation and the slope are obtained from the points t,m.

3.And because the AD straight line is perpendicular to LTherefore, it can be determined that the slope of AD is negative to the slope of L.

4.The expression of the coordinates of the point d is connected by a linear equation. (which necessarily contains a) 5Passed by |ad|=|ed|Determine the expression for the coordinates of point e.

6.In the triangular BEM, b(,m(2,-4),e(??) are knownThe change of angle BEM is found by trigonometric function, because the letter of guarantee parameter a, so the range of change of angle can be determined by the range of a.

7.I don't know what the landlord means by asking about the angle bem = 2x angle btm. The question is that you want to determine the position of a parameter or a point by the angle BEM=2X angle btm?!

If you don't understand, you can add me q:103473139

No, when lad=led, it doesn't exist.

How do you add a picture? Why can you only enter text?

Do you want to prove it?

Let the coordinates of the t point be (a,0), so the linear tm equation is: (a-2)y=4x-4a;

Since Ad is perpendicular to TM, the slope of the straight line Ad is (2-a) 4, so the Ad equation is: 4y=(2-a)x+6(a-2).

Choose C. At the point (x,y) on the x-axis, there must be y=0;At the point (x,y) on the y-axis, there must be x=0, xy=0.

In a Cartesian coordinate system, the set of points on the x-axis, in a Cartesian coordinate system, the set of points on the y-axis, and the set of points on the coordinate axis can be expressed as =. Therefore, the answer is C.

Draw two number axes in a plane that are perpendicular to each other and have a common origin. The horizontal axis is the x-axis and the vertical axis is the y-axis. In this way, we say that a planar Cartesian coordinate system is established on a plane, which is referred to as a Cartesian coordinate system.

The Cartesian coordinate system is also divided into the first quadrant, the second quadrant, the third quadrant, and the fourth quadrant. Count from the corner of the upper right shed and counterclockwise.

The coordinates of the symmetry point of point p(-1,2) with respect to the x-axis are (-1,-2).

So the answer is: (-1, -2).

cos(θ-4)=√2

cosθcos∏/4+ρsinθsin∏/4=√2√2)/2x+(√2)/2y=√2

y=-x+2 is the equation of a straight line.

x/2)^2+y^2=1

x^2)/4+y^2=1

Substituting the linear equation yields 5 4x 2-4x+3=0

In addition to (2, 0), the distance between two points (Song infiltrates 6, 5, 4 5) is obtained by the formula of the distance between two points as (4, 5) 2

Note: Indicates that the following number is a power.

It's very inconvenient to play math online, so let's give it points!

set points a(a,0),b(x,3 x);

Then the area of the triangle OAB is s=3a (2|x|）;

Therefore, when x<0, s=-3a (2x);

The area increases as x increases.

When x>0, s=3a (2x);

The area decreases as x increases.

)∵b（t，0）a（0，6）

ob=t，oa=6

d（t/2，3）

c（3t/2,3）

2) is obtained by b(t,0) as the vertex.

y=a（x-t）²

Substituting c(3t2,3) into obtain.

a=12/t

y=12/t（x-t）²

As the OA becomes smaller, the height on the OA decreases, so the area decreases.

2) b is on the left side of a.

Let b(x,0).

Root number Ranhong 3 2

So x=6-2 root number 3

So od=3 - root number 3

b is on the right side of the chain of care.

Root number 3 2 so wide section sun x = 6 + 2 root number 3

So od=3 - root number 3

In summary, od=3 - root number 3 or 6+2 root number 3

The point m(t-3,5-t) is on the coordinate axis, the point is on the x-axis or the point is on the y-axis, i.e., t-3=0, or 5-t=0, and the solution is t=3 or 5

m is on the x-axis, so m's y-coordinate is 0, so 5-t=0, so t=5

So m is (2,0).

m(2,0 )

Analysis: m is on the x-axis, so the ordinate of the m point is 0, so 5-t=0 t=5, so the horizontal bend of m is 5-3=2!

Because on the x-axis, 5-t=0, t=5, so t-3=2, so m(2,0).