Radian
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High Quality Content by WIKIPEDIA articles! The radian is a unit of plane angle, equal to 180/ (or 360/(2 )) degrees, or about 57.2958 degrees, or about 57°17 45 . It is the standard unit of angular measurement in all areas of mathematics beyond the elementary level. The radian is represented by the symbol "rad" or, more rarely, by the superscript c (for "circular measure"). For example, an angle of 1.2 radians would be written as " 1.2 rad " or " 1.2c " (the second symbol is often mistaken for a degree: " 1.2° "). However, the radian is mathematically considered a "pure number" that needs n...
High Quality Content by WIKIPEDIA articles! The radian is a unit of plane angle, equal to 180/ (or 360/(2 )) degrees, or about 57.2958 degrees, or about 57°17 45 . It is the standard unit of angular measurement in all areas of mathematics beyond the elementary level. The radian is represented by the symbol "rad" or, more rarely, by the superscript c (for "circular measure"). For example, an angle of 1.2 radians would be written as " 1.2 rad " or " 1.2c " (the second symbol is often mistaken for a degree: " 1.2° "). However, the radian is mathematically considered a "pure number" that needs no unit symbol, and in mathematical writing the symbol "rad" is almost always omitted. In the absence of any symbol radians are assumed, and when degrees are meant the symbol ° is used.
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