Trigonometry

3 08 2007

I know, you thought there was no real world use for math. However, I’ve discovered that it’s really quite handy in blacksmithing, not to mention that it turns out to be pretty darned interesting in general. You just have to find a good teacher, which seems to be the most difficult part. Double click the image I’m attempting to attach, then ponder the following simple definitions. As my high school math teacher used to say, “It’s really very simple.”

Trigonometry: The study of angles and of the angular relationships of planar and three-dimensional figures. The following are trigonomic functions. But first of all, let’s agree that theta denotes an angle measured counterclockwise from the x- axis along an arc of the circle. Now, don’t freak out, just look at the image…

The costheta  (cosine of the angle) is the horizontal coordinate of the arc endpoint.

The  sintheta  (sine of the angle) is the vertical component. Trust me, just look at the image.

My point, and I do have one, is that the tangent is calculated by looking at the ratio of sintheta/costheta. So, stop rolling your eyes. Tomorrow’s very important lesson will be how to use that info. I can’t quite remember it right now, but I’ll refer to my notes and if I still can’t figure it out, maybe Walt will ‘splain.

Advertisements

Actions

Information

3 responses

6 08 2007
Walt

More homework:

In today’s Journal World, Pulse section, we find a delightful article on bubbles: http://www2.ljworld.com/news/2007/aug/05/blown_away/ in which we find the following statement:

“His biggest bubble was 10 feet in diameter (a drop in the bucket compared to the Guinness record of 105 cubic feet).

Turn on your mathematical crap detector and see what it tells you.

6 08 2007
Shannon

I see where you get your blog site name now . . .

Anyone for a rousing morning of Fruit Loops and cartoons?

7 08 2007
Walt

At the risk of overdoing the math/writing thing, this is also from the Journal World (Mon. 8 6) ‘ Cross estimated containment at zero percent, “only because there isn’t a lower number.”’

Hmmmm.

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s




%d bloggers like this: