October 2006
Intermediate to advanced
888 pages
16h 55m
English
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5.22. Trigonometry in Degrees, Radians, and Grads
When it comes to measuring arc, the mathematical or “natural” unit is the radian, defined in such a way that an angle of one radian corresponds to an arclength equal to the radius of the circle. A little thought will show that there are 2π radians in a circle.
The degree of arc, which we use in everyday life is a holdover from ancient Babylonian base-60 units; this system divides the circle into 360 degrees. The less-familiar grad is a pseudometric unit defined in such a way that there are 100 grads in a right angle (or 400 in a circle).
Programming languages often default to the radian when calculating trigonometric functions, and Ruby is no exception. But we show here how to do these calculations ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.