The two branches of trigonometry are plane trigonometry, which deals with figures lying wholly in a single plane, and spherical trigonometry, which deals with triangles that are sections of the surface of a sphere.
There is no direct relationship. Trigonometry can be used in criminology as can many branches of mathematics and of science.
geometry, Algebra , trigonometry calculus, physics
Most branches of mathematics - including trigonometry - deal with numbers. The square root of three is a number.
Algebra, Trigonometry and Calculus
Basically it is working out the properties of triangles and angles of various polygons.
I think you need to understand algebra 2 before you begin trigonometry
Trigonometry is the study of plane and spherical triangles. Plane trigonometry deals with 2 Dimensional triangles like the ones you would draw on a piece of paper. But, spherical trigonometry deals with circles and 3 Dimensional triangles. Plane trigonometry uses different numbers and equations than spherical trigonometry. There's plane trigonometry, where you work with triangles on a flat surface, then there's spherical trigonometry, where you work with triangles on a sphere.
2 branches of seamanship
Converting three dimensional settings for projecting onto 2-d screens requires trigonometry.
I suggest that it is (sin A)^2 + (cos A)^2 = 1