Ptolemy Mathematician Quotes & Sayings

Honestly, all of 'Breaking Bad' was the best television experience of my entire life - the writing, the crew, the other actors. — Mark Margolis

Gifts are not things that you earn or deserve they are a way for the giver to show their appreciation for you and Daren, you are a part of my family — Chelsea Fine

I'll be in Los Angeles for two weeks and I'll have a laugh, get battered and have a buzz, but at the end of the day, I'll go home. It's just me earning a few more stories to tell everyone at home and all. — Colin Farrell

Were we closer to the ground as children, or is the grass emptier now? — Alan Bennett

It's like having astronomy without knowing where the stars are. — E. O. Wilson

And I learned that it's a bad idea to curse if you're in trouble, but a good idea to sing, if you can. — Tobias Wolff

The ancient Greek mathematician Ptolemy was born some time at the end of the first century. Ptolemy based his version of trigonometry on the relationships between the chords of circles and the corresponding central angles of those chords. Ptolemy came up with a theorem involving four-sided figures that you can construct with the chords. In the meantime, mathematicians in India decided to use the measure of half a chord and half the angle to try to figure out these relationships. Drawing a radius from the center of a circle through the middle of a chord (halving it) forms a right angle, which is important in the definitions of the trig functions. These half-measures were the beginning of the sine function in trigonometry. In fact, the word sine actually comes from the Hindu name jiva. — Mary Jane Sterling