Question

define 1 radian in short answer

Answer 1

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Answer 2

Answer:

1 radian is the angle which an arc of length equal to the radius of a circle subtends at the centre of the circle.

Explanation:

The arc of a circle subtends an angle at the centre of the circle. This angle is called a plane angle. Its unit is radian.

Similarly, the area of a spherical surface subtends an angle at the centre of the sphere. This angle is called the solid angle.