what is radians?Please explain the concept and the derivation in great detail as I dont know anything about it.

Asked by Anishma Joseph | 21st Jun, 2015, 06:35: PM

Expert Answer:

It is the unit of angle in a plane.
One radian is the angle subtended at the centre of a circle by an arc equal in length to the radius of the circle.

begin mathsize 14px style If space an space arc space of space length space d s space substends space an space angle space d straight theta space at space the space centre space O space of space straight a space circle space of space radius space r comma space then d straight theta equals ds over straight r radian  end style
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Answered by Faiza Lambe | 22nd Jun, 2015, 08:14: AM