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.
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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
Basically it is working out the properties of triangles and angles of various polygons.
Trigonometry based on a unit circle and radians and trigonometry based on a right triangle.