1、r=a( 1-sinθ).

It is said that this is the content of Descartes' last love letter, which contains an unforgettable secret.

2 、( x2+y2)- 16*abs(x)*y=225 .

This function is a heart diagram.

3、X2+(y+3√X2)2= 1 .

Draw a function image, which is a heart.

4、Y= 1/X、X2+Y2=9、Y = │- 2X│X =-3│SinY .

Drawing functional diagrams should also be alive.

5、 128√e986。

Wipe off about half. If you don't erase the e, it's just me, love and you.

6.r=a( 1-cosθ) or r = a (1+cos θ) (a > 0) Horizontal direction.

Heart line.

7、x2+(y-3√x2)2= 1 .

A love is formed on the number axis, which is the exclusive love curve of the department of mathematics.

8. If 1+2 = 2+ 1, then I love you = you love me.

9. You said that the distance between us is getting farther and farther.

I noticed that there are seven rows of seats horizontally and nine rows vertically in the class, and there are two more lanes, which can be counted as 1 1 row. Let the students sitting in the fifth and fourth rows take the coordinate origin, with the fourth row as the X axis and the fifth row as the Y axis. Then your coordinates: you -4, 1, and my coordinates: I 3, 2.

The distance between us:

Let's talk (or you and me) in private.

= the square root of (3+4)+the square of (-2-1).

& gt≈7.6

When the distance between two people is L≥ 10, it can be considered as far. 0