## Trigonometry

Our goal is to present these concepts as clear as possible for your understanding. Trigonometry is a fascinating tool, initially conceived from chords in a Unit-Circle it has wide applications and whenever space is involved Trigonometry is used irrespective of the area of interest. Trigonometry involves the study of concepts like the Sine, Cosine, Tangent and Cotangent.

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#### Trigonometry

In Greek 'Trigonon' means a triangle. 'Metron' means a measure. The combination of these two words gives us the word 'Trigonometry'. Trigonometry is the branch of mathematics that deals with the relations between the sides and angles of triangles. In our study we will deal with the right angled triangles only.#### Trigonometrical Identities

The trigonometric ratio's are: Sine, Cosine, Tangent, Cotangent, Secant, and Cosecant.#### Trigonometric Tables

Trigonometric tables are used (1). to find the value of a t-ratio when the angle is given. (2). to find the angle when the value of the t-ratio is given. As an angle increases, the sine ratio increases, the cosine ratio decreases and the tangent ratio increases.### Make an appointment

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#### Trigonometry XI

An angle is an amount of rotation of a half-line (or ray) in a plane about its end point from an initial position to a terminal position. The important terms are: Measurement of angle, Positive and Negative angles, Lines at right angles, Quadrants, Angle in standard position.Trigonometry by Lial, Hornsby and Schneider |