Mathematical function and Trigonometric function

Mathematical 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 mathematical function are semantically related. In some cases you can replace phrase "Trigonometric function" with "Mathematical 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.

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