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Emmanuel José García's user avatar
Emmanuel José García's user avatar
Emmanuel José García's user avatar
Emmanuel José García
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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.

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Applications for generalized Lami's theorem
Apr 15, 2023
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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
A generalization of the law of tangents
9
Solving 'impossible' integrals with a new (?) trick