Skip to main content
MathOverflow
Emmanuel José García's user avatar
Emmanuel José García's user avatar
Emmanuel José García's user avatar
Emmanuel José García
  • Member for 8 years, 2 months
  • Last seen more than a month ago
Profile Activity
Stats
296
reputation
227
reached
0
answers
1
question
Communities
View all
About

The half-angle formulas are central!

Context: The theoretical importance of half-angle formulas

And as a picture is worth a thousand words...

The arrows indicate that the identity at the tail of the arrow implies the identity at the head of the arrow.

Badges
This user doesn’t have any gold badges yet.
1
silver badge
7
bronze badges
Top tags
0
Score
1
Posts
100
Posts %
0
Score
1
Posts
100
Posts %
0
Score
1
Posts
100
Posts %
Top posts
question
0
Inconsistency in MO votes
Feb 16
Top network posts
View all network posts
13
The theoretical importance of the half-angle formulas
11
Trigonometric formula for solving quadratic equations
10
Generalization of the law of tangents for a cyclic quadrilateral
9
Showing $\int_{-1}^{1} \frac{125}{12}\sqrt[10]{\frac{1 + x}{1 - x}} (x^2 - x) \, dx = \phi\pi$
9
A generalization of the law of tangents