Single-valued function and Trigonometric function

Single-valued function noun - Mathematics) a mathematical relation such that each element of a given set (the domain of the function) is associated with an element of another set (the range of the function.

Trigonometric function and single-valued function are semantically related. In some cases you can replace phrase "Trigonometric function" with "Single-valued function", this phrases are similar.

Trigonometric function noun - Function of an angle expressed as a ratio of the length of the sides of right-angled triangle containing the angle.

Single-valued function and trigonometric function are semantically related. You can use "Single-valued function" instead a noun phrase "Trigonometric function".