- trigon
- trigonal
- trigonal dipyramid
- trigonalizable
- trigonalizable element
- trigonalizable matrix
- trigonal residue
- trigonal system
- trigonometric addition formula
- trigonometrical form of complex number
- trigonometrically conjugate functions
- trigonometric angle
- trigonometric approximation
- trigonometric approximation polynomial
- trigonometric convexity
- trigonometric degree of accuracy
- trigonometric equation
- trigonometric form
- trigonometric Fourier series
- trigonometric function
- trigonometric function interpolation
- trigonometric function line
- trigonometric identity
- trigonometric inequality
- trigonometric integral