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Why does this Intergral question need to be in radians?

Hey guys,I was doing this integral question and when I submitted the limits in it was incorrect. I submitted in the converted limits in degrees but they wanted radians. Why is that? If the question asks me for an EXACT value should I always calculate my limits in radians? What keywords tell you that you need to be in radians.
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Avatar for cogito.
cogito.
12
Original post by thebobby
Hey guys,I was doing this integral question and when I submitted the limits in it was incorrect. I submitted in the converted limits in degrees but they wanted radians. Why is that? If the question asks me for an EXACT value should I always calculate my limits in radians? What keywords tell you that you need to be in radians.


Always use radians, not the exam board likes to use those things, but because the degrees is WRONG.


The 0,90,180,360 is not UNIVERSAL and integration is considered to be universal, so you cannot use degrees.

http://math.stackexchange.com/questions/720924/why-do-we-require-radians-in-calculus
(edited 8 years ago)
Original post by cogito.
Always use radians, not the exam board likes to use those things, but because the degrees is WRONG.


The 0,90,180,360 is not UNIVERSAL and integration is considered to be universal, so you cannot use degrees.

http://math.stackexchange.com/questions/720924/why-do-we-require-radians-in-calculus


So anytime I do any intergration always use radians mode? So when Im converting the limits in terms of U ,say I would have to use radians all the time?
Reply 3
Avatar for cogito.
cogito.
12
Original post by thebobby
So anytime I do any intergration always use radians mode? So when Im converting the limits in terms of U ,say I would have to use radians all the time?


For a short answer, yes.

However, i recommend you always use radians in any maths questions, unless the question specifically ask you to use other things.

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