Trigonometry is a branch of mathematics that studies relationships involving lengths and angles of triangles. The field emerged in the Hellenistic world during the 3rd century BC from applications of geometry to astronomical studies Trigonometry is most simply associated with planar right-angle triangles (each of which is a two-dimensional triangle with one angle equal to 90 degrees). The applicability to non-right-angle triangles exists, but, since any non-right-angle triangle (on a flat plane) can be bisected to create two right-angle triangles, most problems can be reduced to calculations on right-angle triangles. Thus the majority of applications relate to right-angle triangles. One exception to this is spherical trigonometry, the study of triangles on spheres, surfaces of constant positive curvature, in elliptic geometry (a fundamental part of astronomy and navigation). Trigonometry on surfaces of negative curvature is part of hyperbolic geometry. It requires intensive tutoring help and extensive research to excel in this subject with high grades. At USAdisseration, our tutors specializes in trigonometry assignment writing services, trigonometry dissertation writing tips and ideas Fill in the form below and our tutors will deliver superior quality assignment services for your high grades. We are here to cater to your trigonometry assignment writing services, trigonometry dissertation writing tips and ideas.