- simultaneous substitution
- Sinai billiards
- Sinaǐ, Ya.G.(Синай, Я.Г.)
- Sinclair, G.
- Sinclair soap film problem
- sinc (= sine cardinal function)
- sine amplitude
- sine curve
- sine formula
- sine function
- sine-Gordon equation
- sine hyperbolic
- sine integral
- sine-integral function
- sine law
- sine series
- sine spiral
- sine surface
- sine-tangent theorem
- sine theorem
- sine transform
- sine-triple-angle circle
- sine wave
- Singer, I.M.
- single