anonymous
  • anonymous
In a circle, S=r*(theta2-theta1). Must the angle difference be in rad or in degrees? How to know when to use each?
Mathematics
katieb
  • katieb
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amistre64
  • amistre64
radians are the standard. Radians come from radius measurements.
anonymous
  • anonymous
what about degrees? when do I use them?
amistre64
  • amistre64
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?

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anonymous
  • anonymous
Yes
amistre64
  • amistre64
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
  • amistre64
degrees are a measure of rotations; raadians are a measure of distance....
anonymous
  • anonymous
ahhh ok. So I should use both in my example?
amistre64
  • amistre64
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
  • anonymous
Ok thanks

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