Law of Tangents
Let a Triangle have sides of lengths 
, 
, and 
and let the Angles opposite these sides by
, 
, and 
. The law of tangents states
An analogous result for oblique Spherical Triangles states that
See also Law of Cosines, Law of Sines
References
Abramowitz, M. and Stegun, C. A. (Eds.). Handbook of Mathematical Functions with Formulas, Graphs, and Mathematical Tables, 9th printing. New York: Dover, p. 79, 1972. Beyer, W. H. CRC Standard Mathematical Tables, 28th ed. Boca Raton, FL: CRC Press, pp. 145 and 149, 1987.
- Schauder Fixed Point Theorem
- Scheme
- Schensted Correspondence
- Scherk's Minimal Surfaces
- Schiffler Point
- Schinzel Circle
- Schinzel's Hypothesis
- Schinzel's Theorem
- Schisma
- Schlegel Graph
- Schläfli Double Six
- Schläfli Function
- Schläfli Integral
- Schläfli Polynomial
- Schläfli's Formula
- Schläfli's Modular Form
- Schläfli Symbol
- Schlömilch's Function
- Schlömilch's Series
- Schmitt-Conway Biprism
- Schnirelmann Constant
- Schnirelmann Density
- Schnirelmann's Theorem
- Schoenemann's Theorem
- Scholz Conjecture