Question

why we need radian measure of angle???

Answer 1

That's similar to asking why do we need cm when we can just measure in inches? Radians are a much more useful way of measuring angles. When you are in calculus many problems are simpler when the angles are measured in radians. Learn them well.

Answer 2

because degree value are different from number values
and radian coverts the degrees into a number

Answer 3

ok thank you guys