Part 1 of Essay
is based on the study of right-angled triangles. This is a form of geometry that developed out of the study of the stars. It is also concerned with the relationships that exist between the sides and angles of triangles, and their measurement. comes in two forms, spherical and plane. Spherical is the study of curved t ....

Part 2 of Essay
.... showing the Greek letter theta, 0. The sine is the ratio of o, which is the length of the side opposite 0, to h, which is the length of the hypotenuse. The cosine is the ratio of a, the length of the side adjacent to 0, to h, the length of the hypotenuse. The tangent is the ratio of o, the length of the side opposite 0, to a, the length of the side adjacent to 0. sin 0 = o/h cos 0 = a/h tan 0 = o/a is considered to be an important component within every mathematics course, while its rules and formulae, the ....