- triangulation
- triangulation
- triangulation
- triangulation chain
- triangulation network
- triangulation point
- trichotomy for cardinals
- trichotomy of an ordered set
- trichotomy of natural numbers
- Tricomi equation
- Tricomi problem
- tricomplex
- tricotyledon theory of system design
- tri-dimensional scatter diagram
- Triebel-Liaorkin space
- trigonometric accuracy
- trigonometric circle
- trigonometric equation
- trigonometric form of complex numbers
- trigonometric formula of sum of angles
- trigonometric function
- trigonometric function line
- trigonometric function of arbitrary angles
- trigonometric function of special angles
- trigonometric functions of a complex variable