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Re: Can anybody teach me trigonometry?

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bombastically is not online. bombastically
Joined: 28 Feb 2014
Total Posts: 128
22 Apr 2014 12:05 AM
I can't wait any longer until I get to highschool and they start teaching trig, but right now I'm in 6th grade and I need to figure out how to use trigonometry for my own projects.

I've been using KhanAcademy to learn about unit circles and stuff, but they don't really explain the stuff I need to know, like how to get the angle from a GUI's position to the mouse's position. (I've been watching the videos but I don't know how to apply my knowledge.) So can anybody here help me learn this stuff, because I'm not gonna wait 4 years for it. I know you guys are smart and can help me :P so please do. Thanks!

P.S.

#inb4flamed
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dogwarrior24 is not online. dogwarrior24
Joined: 10 Nov 2010
Total Posts: 1401
22 Apr 2014 12:21 AM
sine
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Devoi is not online. Devoi
Joined: 09 Jun 2013
Total Posts: 5387
22 Apr 2014 12:22 AM
cosine
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dogwarrior24 is not online. dogwarrior24
Joined: 10 Nov 2010
Total Posts: 1401
22 Apr 2014 12:27 AM
tangent
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noobertuber is not online. noobertuber
Joined: 16 Jan 2007
Total Posts: 2321
22 Apr 2014 12:32 AM
x^-1 + x/6 + 7/360*x^3...
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bombastically is not online. bombastically
Joined: 28 Feb 2014
Total Posts: 128
22 Apr 2014 12:38 AM
Thanks now I know trigonometry!
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dogwarrior24 is not online. dogwarrior24
Joined: 10 Nov 2010
Total Posts: 1401
22 Apr 2014 01:08 AM
your welcome :D
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TigreBlood is not online. TigreBlood
Joined: 31 Jul 2011
Total Posts: 1107
22 Apr 2014 02:53 AM
Well trigonometry is the study of right triangles hence the name Trigo meaning triangle and Nometry meaning the study of something.
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coolmama50544 is not online. coolmama50544
Joined: 06 Aug 2009
Total Posts: 4565
22 Apr 2014 09:48 AM
Look for more sources online, and ask specific questions on various forums. Then just study what you learn.
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kubuto2 is not online. kubuto2
Joined: 16 Jul 2008
Total Posts: 1275
22 Apr 2014 06:44 PM
|\
|_\
|__\
|30_\
|____\ SohCohToa
|_____\
|______\ Trig, is like counting to 180,
|_______\ but with triangles.
|________\
|_________\ Some equations too.
|__________\
|________60_\ There is no such math in programming,
|_|__________\ unless you wan't to make something cool.
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morash is not online. morash
Joined: 22 May 2010
Total Posts: 5834
22 Apr 2014 09:09 PM
"SohCohToa"

Isn't it SohCahToa?

Sine = Opposite/Hypotenuse
Tangent = Opposite/Adjacent
Cosine = Adjacent/Hypotenuse
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kubuto2 is not online. kubuto2
Joined: 16 Jul 2008
Total Posts: 1275
23 Apr 2014 02:11 PM
Ya it is, typo...
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crossbar is online. crossbar
Joined: 08 Dec 2009
Total Posts: 2817
23 Apr 2014 04:15 PM
I'm the trig master. ;)

f = 1/5 period = 1/5
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Leeav is not online. Leeav
Top 100 Poster
Joined: 07 Sep 2006
Total Posts: 1905
23 Apr 2014 05:04 PM
https://www.youtube.com/watch?v=F21S9Wpi0y8
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AMasterProgrammer is not online. AMasterProgrammer
Joined: 02 Apr 2013
Total Posts: 1608
23 Apr 2014 07:56 PM
that video is good
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Fluffmiceter is not online. Fluffmiceter
Joined: 28 Jan 2012
Total Posts: 6931
23 Apr 2014 08:02 PM
ehh you need to know about opposite and adjacent in a right triangle even before I can lecture you. Also, visuals would be great.
SohCahToa
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gijsbel11 is not online. gijsbel11
Joined: 07 Feb 2009
Total Posts: 4223
24 Apr 2014 02:58 AM
To get the angle between two points you need to know the right angle triangle between those points and then use the inverse tanges = atan2(o,a):

point1 = {100,50)
point2 = (200,90)
trianglex = point2[1]-point1[1]
triangley = point2[2]-point1[2]
angle = atan2(triangley,trianglex)

in this example we calculate the angle from point1 TO point 2, not the reverse.
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