In a circle, S=r*(theta2-theta1). Must the angle difference be in rad or in degrees? How to know when to use each?

Question

amistre64 · Answer

radians are the standard.  Radians come from radius measurements.

anonymous · Answer

what about degrees? when do I use them?

amistre64 · Answer

you use degrees when you want information to be expressed in degrees.  But if i recal correctly, 'S' is the length of the arc of a sector right?

anonymous · Answer

Yes

amistre64 · Answer

whenever you need a measurement; you use the radius as a measureing devise; and your answer is in radians..

Whenever you want to know the measure of the angle itself, degrees or radians willl work

amistre64 · Answer

degrees are a measure of rotations; raadians are a measure of distance....

anonymous · Answer

ahhh ok. So I should use both in my example?

amistre64 · Answer

use both; and see which one you like best :)

but if yo are measureing the distance of the arc length; 's'; the standard is radians.... it sounds silly to say.. its 60 degrees long :)

anonymous · Answer

Ok thanks