how to find radian from 3.85*10^8

Radians are a unitless number. There are 2*PI radians in 360 degrees.

What's your question? What are the unit of your number?
Degrees? Unitless, thus radians?

Radians are a unitless number. There are 2*PI radians in 360 degrees.

What's your question? What are the unit of your number?
Degrees? Unitless, thus radians?

I've never heard that radians are unitless... they are measured in radians (or 'rad').


There are 2*PI radians in 360 degrees.

See?

Well, OK.

In any case, I agree that the OP isn't making much sense. OP, can you phrase your question any clearer for us?

I've never heard that radians are unitless... they are measured in radians (or 'rad').

See?

I'll pick a nit here. Radians are indeed unitless, as are degrees. By this I mean that they have no component of distance, mass, or time, and consequently do not convert in the way that SI units do. From http://en.wikipedia.org/wiki/Radian:

However, the radian is mathematically considered a "pure number" that needs no unit symbol, and in mathematical writing the symbol "rad" is almost always omitted. In the absence of any symbol radians are assumed, and when degrees are meant the symbol ° is used