while using equations of circular motion why do we need to express all angles in radians?
[itex] s = r \theta [/itex] (i.e. arc-length equals radius times angle) is only true when the angle is expressed in radians.
In other words, we know that [itex]\pi[/itex] is a special number, such that the circumfrence equals [itex]2 \pi r [/itex] for any circle. And so we use radians to make use of this special number.
good..got it thanks
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