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Trigonometry

Trigonometry 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. Trigonometry comes in two forms, spherical and plane. Spherical is the study of curved triangles lying on the surface of a hypothetical sphere, which is mainly used by astronomers and navigators. Plane is the study of more variety and is mainly focused on by many books on trigonometry. In trigonometry, the ratio between any two sides of a right-angled triangle is given as a function of angles within the triangle. These ratios are called trigonometric functions. Even though there are six types of trigonometric functions, three of them are commonly used ratios are sine, cosine, and tangent. The other three are cotangent, secant, and consecant. Here is an example of how trigonometric functions of a general angle work. The angle, as shown in the diagram, is measured by usually 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




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Approximate Word count = 946
Approximate Pages = 4 (250 words per page double spaced)

  

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