Question

what is radion in trigonometry class 11 *

Answer 1

The radian is a unit of measure for angles used mainly in trigonometry. It is used instead of degrees. Whereas a full circle is 360 degrees, a full circle is just over 6 radians. A full circle has 2π radians (Roughly 6.28) As seen in the figure above, a radian is defined by an arc of a circle.

Answer 2

A radian is actually a SI unit to measure the angle and for a complete 360 degree the angle in radian is 2π
so on comparing we have
2π = 360
so
π = 180 degree

so to solve the angles u have to take the value of π = 180

and when u get the angle in radian with π u can solve it by using the valoue of π = 22/7.