Trigonometric

It should be noticed that while a, b, and h are lines, the ratio of any two of them is an abstract number; that is, the trigonometric functions are abstract numbers. ❋ Unknown (2008)

The six functions just defined are variously known as the trigonometric, circular, or goniometric functions ❋ Unknown (2008)

On the other hand, the trigonometric functions are better seen as the coordinate functions of a point traveling around the unit circle at unit speed. ❋ Unknown (2010)

And so there must be some equation relating the exponential to the trigonometric functions. ❋ Unknown (2010)

To make sure he was spacing the holes exactly right, he scrawled a triangle and some trigonometric calculations on a notepad. ❋ James R. Hagerty (2011)

It has to do with what happens when you do Taylor series expansions of trigonometric functions of imaginary numbers. ❋ Unknown (2010)

The plain fact that there is an equation relating the trigonometric functions to the exponential function is really cool. ❋ Unknown (2010)

They thought they could just proceed from there, but things got messy (sorry) as they cut the pizza more times, or, as New Scientist puts it, “the solution still included a complicated set of sums of algebraic series involving tricky powers of trigonometric functions,” summed up more succinctly as “ugly.” ❋ Ewillett (2009)

When trigonometric functions are added, then the number of nines can greatly increase. ❋ Unknown (2009)

The great trigonometric waterfalls, warm as bathwater for once. ❋ Unknown (2010)

I still remember having to look up logarithms and trigonometric values in the back of the text book. ❋ Unknown (2010)

A brilliant student with a prodigious memory, she studied mathematics and physics at the University of Vienna from 1913 to 1917 and wrote a groundbreaking doctoral dissertation on double trigonometric (Fourier) series. ❋ Unknown (2009)

The Hindu systems developed the sine function, and thus employ trigonometric rather than solely geometric methods. ❋ Unknown (2009)

The calculations in the Tibetan system, on the other hand, involve neither geometric proportions nor trigonometric functions, but are purely arithmetic. ❋ Unknown (2009)

Cecile only talked to him because he was able to solve complicated trigonometric theories, which he demonstrated on a napkin while they sat out a dance. ❋ Unknown (2009)