- 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
- trigonometric identity
- trigonometric inequality
- trigonometric interpolating polynomial
- trigonometric interpolation
- trigonometric leveling
- trigonometric operation of inverse trigonometric function
- trigonometric polynomial
- trigonometric polynomials of best approximation
- trigonometric ratio
- trigonometric representation of complex number
- trigonometric series
- trigonometric substitution
- trigonometric sum method
- trigonometric sum with prime numbers
- trigonometry
- trihedral angle