A friend of mine made this picture to illustrate the law of sines.

http://img27.photobucket.com/albums/...w_of_sines.jpg

I kinda see a pattern, but not completely...and I don't know how this knowledge would be useful.

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- 03-24-2004KrakLaw of Sines?
A friend of mine made this picture to illustrate the law of sines.

http://img27.photobucket.com/albums/...w_of_sines.jpg

I kinda see a pattern, but not completely...and I don't know how this knowledge would be useful. - 03-24-2004ober
It's not really. Sure, it shows what is going on, but I don't think I'd put that in a tutorial or anything.

- 03-24-2004EvBladeRunnervEQuote:

and I don't know how this knowledge would be useful.

- 03-24-2004linuxdude
the theorem stateshttp://hyperphysics.phy-astr.gsu.edu...mages/lsin.gif

- 03-24-2004axon
what the hell is the point of this thread?? and, yes law of sines and cosines is very useful...how can you not see that?? ahhhhh

;) - 03-24-2004XSquared
Here's a sample application:

You're in engineering, and need to know the height of an object. You're standing 50 meters away from the base of the object, and when you measure from the ground to the top of the object, it is a 48 degree angle (from horizontal). You know that the object makes a 83 degree angle with the ground.

Hint: Draw a diagram to understand it better. I can't make up one right now.

Solution:

Code:`let d be the distance from you to the object`

let h be the height of the object

let theta be the angle from the ground to the top

let alpha be the angle the object makes with the ground

let gamma be the other angle in the triangle

gamma = 180 - theta - alpha

= 49

sin gamma / d = sin theta / h

sin49 / 50 = sin48 / h

h = 50sin48 / sin49

h = 49.23 (approx)

- 03-24-2004XSquared
Here's a diagram.

- 03-24-2004Leeman_s
What's it useful for? It's useful so we can algebraically find values of sides and angles of trianges we wouldn't otherwise be able to find, without measuring ourself.