It's been way too long since high school and I'm having a hard time figuring out some things of trigonometry, for the most part circles.
I need a really well made online tutorial on circles, the rest of it is pretty simple. It does not matter whether it is video/text, as long as it gets the job done.
Anyone know of a good website that really explains trigonometry?
P.S. I've tried many Google/Youtube links and most of it blew by too fast explaining things about circles, or just covered very basic trig
[editline]07:16AM[/editline]
nevermind, it's easy ass stuff, of course I make a thread and than I figure it out
khanacademy Trigonometry playlist on youtube
SOH CAH TOA :science:
SOH CAH TOA is good because you can think of them as formula triangles, with the middle letter always being on the top. So:
For lengths
Sine x Hypotenuse = Opposite
Cosine x Hypotenuse = Adjacent
Tangent x Adjacent = Opposite
For angles
Sin ^ -1 x (Opposite / Hypotenuse)
Cos ^ -1 x (Adjacent / Hypotenuse)
Tan ^ -1 x (Opposite / Adjacent)
[QUOTE=The DooD;21063103]SOH CAH TOA :science:[/QUOTE]
The Cat Sat On An Oven And Howled Horrifically. :science:
[QUOTE=The DooD;21063103]SOH CAH TOA :science:[/QUOTE]
Oscar Had A Hairy Old Ass.
Circles aren't a part of trigonometry. Unless of course the circle is on a triangle. :razz:
[QUOTE=andersonmat;21066218]Circles aren't a part of trigonometry. Unless of course the circle is on a triangle. :razz:[/QUOTE]
I think he's probably talking about the unit circle, where cos(Pi/4) is Rt(2)/2 and such. If so, than the OP could use this:
[img]http://www.math.tamu.edu/~austin/unit_circle.png[/img]
Phasers/Phasors are part of trigonometry and they are circles.
[QUOTE=The DooD;21063103]SOH CAH TOA :science:
[/QUOTE]
Slap On Head Causes A Headache Take One Aspirin
[QUOTE=windwakr;21085176]Knowing SOH CAH TOA is no help when you want to use the shit.[/QUOTE]
SOH CAH TOA helped me when I wrote my (shitty) raytracer
[QUOTE=windwakr;21085176]It's not like you ever work with the sides of triangles when using trig on a computer.[/QUOTE]
I use it all the time ?
You need to know which function you should be using based upon what values you have. Most (All ?) Trigonometry problems can be drawn with a right angle'd triangle.
For example, take a 2D radar for a game. You have the vector from yourself to the target and you want to know where to plot it on the radar. You can simplify this as a right angled triangle - You take the vector to the target and dot product it against your forward vector to get the angle. You then need to plot the dot on the radar and this is where the triangle comes in.
If you think about your radar as having a triangle where the known angle is in the centre, the adjacent side is facing north and the opposite side is connection with the target point. (Assuming an angle of less than 90 degrees for the above positions.) You then use TOA CAH SOH to work out which function you should be using for each side you want to work out. (Cosine for Y, Sine for X in this case.) Without those silly sentences, how would you know which function to use ? (Other than trial and error.)
Edit: The link you gave gives a million and one uses for Trigonometry, but again you still need to know which function to use.
[QUOTE=The DooD;21077715]Phasers/Phasors are part of trigonometry and they are circles.[/QUOTE]
Only because you can use the sine waves as a moving vector. Which you'd use triangles to calculate different aspects of it.
Thanks guys, I figured most of circles out
I was expecting to be flamed, trigonometry hurrr, but everyone was helpful
Thanks again
Touching up your trigonometry?
[img]http://dl.dropbox.com/u/5062494/junk/touchingTrig.png[/img]
hardy har har
[QUOTE=Jallen;21094753]Touching up your trigonometry?
[img]http://dl.dropbox.com/u/5062494/junk/touchingTrig.png[/img][/QUOTE]
it's common logic really.
