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+--- Thread: Need major help (/Thread-Need-major-help)
Need major help - Branno - 03-18-2013
Hey guys. I have a big exam coming tomorrow for maths. I'm studying but I do not understand what this is telling me. This is about sin & cosine functions.
http://prntscr.com/wrtib
Where did 1/4 come from?
All help is appreciated.
RE: Need major help - Lincoln Burrows - 03-18-2013
I wish I could help you bro. What type of math is this? Meaning class
RE: Need major help - ✧Sirius Paradox✧ - 03-18-2013
First of all, it's explaining that their is two Pi Radians in one revolution, or in this case a 360° Sine/Cosine wave. As you can see, the area of the wave that is being highlighted is 8 Pi Radians, which is 4x bigger than one revolution (2 Pi Radians/360°). So it's basically saying, you need to scale it (multiply) to get to the number 8.
Break Down:
2 Radians are in a typical Cosine/Sine wave.
Their are 2 Pi Radians in one revolution. (360°)
Cosine/Sine waves are generally 360°.
-----------
Scale = Since 2 Radians is the limit, we need to get to 8 Radians. What do we do to get from 2 Radians to 8? You times two by 4.
-----------
You get that? It's 2:20am, and I'm a little tired.
RE: Need major help - Branno - 03-18-2013
(03-18-2013, 03:08 AM)Lincoln Burrows Wrote: I wish I could help you bro. What type of math is this? Meaning class
This is Mathematics B.
(03-18-2013, 03:20 AM)✧Sirius Paradox✧ Wrote: First of all, it's explaining that their is two Pi Radians in one revolution, or in this case a 360° Sine/Cosine wave. As you can see, the area of the wave that is being highlighted is 8 Pi Radians, which is 4x bigger than one revolution (2 Pi Radians/360°). So it's basically saying, you need to scale it (multiply) to get to the number 8.
Break Down:
2 Radians are in a typical Cosine/Sine wave.
Their are 2 Pi Radians in one revolution. (360°)
Cosine/Sine waves are generally 360°.
-----------
Scale = Since 2 Radians is the limit, we need to get to 8 Radians. What do we do to get from 2 Radians to 8? You times two by 4.
-----------
You get that? It's 2:20am, and I'm a little tired.
I didn't even look at it in that perpective of the 360° revolution.
This clears up a lot. Thanks Sirius.
RE: Need major help - Wonders - 03-20-2013
How did you end up going on your exam?
RE: Need major help - Branno - 03-20-2013
(03-20-2013, 11:51 AM)LeGrand Wrote: How did you end up going on your exam?
I went ok. I forgot all the rules when we walked in, I'm like, fuck.
RE: Need major help - Wonders - 03-20-2013
(03-20-2013, 12:19 PM)Branno Wrote: I went ok. I forgot all the rules when we walked in, I'm like, fuck.
Haha fuck. Yeah I hate exams/tests etc. which is why I left school.
RE: Need major help - OversouL - 03-20-2013
(03-18-2013, 03:20 AM)✧Sirius Paradox✧ Wrote: First of all, it's explaining that their is two Pi Radians in one revolution, or in this case a 360° Sine/Cosine wave. As you can see, the area of the wave that is being highlighted is 8 Pi Radians, which is 4x bigger than one revolution (2 Pi Radians/360°). So it's basically saying, you need to scale it (multiply) to get to the number 8.
Break Down:
2 Radians are in a typical Cosine/Sine wave.
Their are 2 Pi Radians in one revolution. (360°)
Cosine/Sine waves are generally 360°.
-----------
Scale = Since 2 Radians is the limit, we need to get to 8 Radians. What do we do to get from 2 Radians to 8? You times two by 4.
-----------
You get that? It's 2:20am, and I'm a little tired.
I see a math wiz here wooot! : o ; P
RE: Need major help - Versace - 03-20-2013
Please remain on topic, this thread went way off topic and only reason I'm not handing out warnings is because I'd have to warn about 5 of you.