A radian (rad) is a unit of distance along the circumference of a circle. 1 radian represents a distance of 1 radius.
There are 2π radians in a circle, which makes sense since the circumference of a circle is 2πr.
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Trigonometry
A radian (rad) is a unit of distance along the circumference of a circle. 1 radian represents a distance of 1 radius.
There are 2π radians in a circle, which makes sense since the circumference of a circle is 2πr.