Using trigonometry

romma

Hey Guys,

Is there a site or forum post or any source that has relevant information to using trigonometry in GS?

For example. "To acomplish X you can use sin() because X"

Maybe not that specific but a way for us who don't remember trig from school.

Thanks!

MotherHoose

1. sin (sine); cos (cosine); tan (tangent) … and, their reciprocals … are just terms
… that are used in right triangles
… to show any of the 3 angle's relationship to the sides of that triangle

2. any XY point on a plane (flat surface) forms two right angles
… the length of the X from that point …and the length of the Y from that point… are 2 sides of 2 right triangle
… the end of the X and the end of the Y can be joined with a diagonal straight line (the hypotenuse)
… whether the lines are imaginary or actually drawn

fortunately, for us, the computer calculates the correct sin; cos; tan for any X,Y point
so we never have to bother figuring out what their number values are

and once you do the Wikipedia site that @Rob2 gave us … then

@LudwigHeijden … beautiful interactive demo to download:
http://forums.gamesalad.com/discussion/38780/free-sin-and-cos-tool-for-cool-movements-free/p1

also this site: http://www.intmath.com/trigonometric-functions/2-sin-cos-tan-csc-sec-cot.php

MH

Rob2

A fantastic resource http://en.wikipedia.org/wiki/Pythagorean_trigonometric_identity

(if you jump right in to the 'proof using the unit circle' you can figure out all sorts of clever rotational stuff )

tatiang

I've had to re-learn a lot of trig for GS. The unit circle is huge. I'd love to know of a resource, too, but I think a lot of it is just sketching out what you want to do and then trying to come up with a few equations (and asking lots of questions here...).

LumpApps

Awesome @motherhoose
I don't have to reply myself anymore.
Thanks!

zoomincalc

If you want an easy method for remembering the Unit Circle try http://www.zoomincalc.com and watch the 5 Unit Circle videos.