Wednesday, November 12, 2008

Systems of Measuring Angles

sexagesimal system or English system

Circular system

French system

First two are commonly used.

In sexagesimal system, a right angle is divided into 90 equal parts called degrees.

In Circular system, the unit of measurement is radian. One radian is the angle made by an arc of length equal to radius of a given circle at its centre.

Topic of
Trigonometric ratios, Identities and Maximum & Minimum Values of Trigonometrical Expressions

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