Mollweide's formulas relate the side lengths 
, 
, and 
of a triangle to its angles 
, 
, and 
:
 |  | ![(sin[1/2(B-C)])/(cos(1/2A))](/images/equations/MollweidesFormulas/Inline9.svg) |
(1)
|
 |  | ![(sin[1/2(C-A)])/(cos(1/2B))](/images/equations/MollweidesFormulas/Inline12.svg) |
(2)
|
 |  | ![(sin[1/2(A-B)])/(cos(1/2C)).](/images/equations/MollweidesFormulas/Inline15.svg) |
(3)
|
Mollweide's Formulas
See also
Newton's Formulas, Triangle, TrigonometryExplore with Wolfram|Alpha
References
Beyer, W. H. CRC Standard Mathematical Tables, 28th ed. Boca Raton, FL: CRC Press, p. 146, 1987.Referenced on Wolfram|Alpha
Mollweide's FormulasCite this as:
Weisstein, Eric W. "Mollweide's Formulas." From MathWorld--A Wolfram Resource. https://mathworld.wolfram.com/MollweidesFormulas.html