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Aug
10
revised Is there a symbol that I can attach to a pair of line segments which are parallel and equal length?
added 104 characters in body
Jul
28
revised How to find the intersection points of lines that are normal to two curves?
added 182 characters in body
May
7
revised Functions Question
Completing the math markup.
May
6
revised How to determine the coordinate of roller coaster's wheels?
added 366 characters in body
Mar
15
revised Integral by parts of this function
added 41 characters in body
Feb
10
revised How to prove the number of images of two mirrors inclined at $A$ is $360/A -1$
edited body
Jan
21
revised How to find the closed solution for the following recursive vector equations?
added 50 characters in body
Dec
3
revised How to prove by contradiction that there is only one circle with the given segment AB as its diameter?
deleted 669 characters in body
Dec
3
revised How to prove by contradiction that there is only one circle with the given segment AB as its diameter?
added 677 characters in body
Nov
20
revised What is the explicit formula for the sequence representing the number of any triangles in a triangular grid?
deleted 174 characters in body
Nov
20
revised What is the explicit formula for the sequence representing the number of any triangles in a triangular grid?
deleted 36 characters in body
Nov
20
revised What is the explicit formula for the sequence representing the number of any triangles in a triangular grid?
added 297 characters in body
Nov
6
revised How to solve $7200a+720b+72c=1000x+340+y<10000$?
Fixing a typo.
Oct
30
revised How to analytically prove that the area of a closed curve is conserved under “tearing-and-reattaching” transformation?
added 75 characters in body
Oct
25
revised Proof of $(\forall x)(x^2+4x+5 \geqslant 0)$
added 116 characters in body
Oct
6
revised How to find the general solution of $\tan \left(x+\frac{\pi }{3}\right)+3\tan \left(x-\frac{\pi }{6}\right)=0$
Adding a spoiler to the image to make it more fancy. :-)
Oct
6
revised How does the author get from one step to another?
added 167 characters in body
Oct
6
revised How does the author get from one step to another?
added 80 characters in body
Oct
5
revised Riddle: 1 question to know if the number is 1, 2 or 3
added 310 characters in body
Oct
4
revised Riddle: 1 question to know if the number is 1, 2 or 3
edited body