2π radians
360°
2π radians is equivalent to one full revolution or one complete circle. In other words, if you start at a particular point on a circle and travel along the circumference of the circle for a distance equal to the radius of the circle, you will have traveled an angle of 2π radians. This is also equivalent to 360 degrees.
Radian is a unit of measurement for angles, and it is defined as the ratio of the length of an arc on a circle to the radius of the circle. In mathematical terms, 1 radian is equal to the angle subtended at the center of a circle by an arc that is equal in length to the radius of the circle.
Radian measure is often used in mathematics and physics, as it provides a natural way to measure angles in circular motion, and it simplifies many mathematical calculations involving trigonometric functions.
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