''There is perhaps nothing which so occupies the middle position of mathmatics as trignometry'' Pls explain - Maths - Introduction to Trigonometry

Question

''There is perhaps nothing which so occupies the middle position of
mathmatics as trignometry'' Pls explain

Sudarshan Vijay · Accepted Answer

it is the very important part of the maths is trignomentry and it
is unique from the all chapters it is hard to understand

''There is perhaps nothing which so occupies the middle position of mathmatics as trignometry''. Pls explain..