Quote by David Stipp

After exponential quantities the circular functions, sine and cosine, should be considered because they arise when imaginary quantities are involved in the exponential.

— Leonhard Euler

Those who have more power are liable to sin more; no theorem in geometry is more certain than this.

— Lord Acton

“The sine of an angle is the ratio of the lengths of the side of the triangle opposite the angle and the hypotenuse.”

— Keith Peters

Pi is not merely the ubiquitous factor in high school geometry problems; it is stitched across the whole tapestry of mathematics, not just geometry's…

— Robert Kanigel

That, if a straight line falling on two straight lines makes the interior angles on the same side less than two right angles, the…

— Euclid

Magic lives in curves, not angles.

— Mason Cooley

Our eyes met in the math class. How were we to know that trigonometry would lead to matrimony?

— Sophie Kinsella

“Fourier succeeded in proving a theorem concerning sine waves which astonished his, at first, incredulous contemporaries. He showed that any variation of a quantity…

— John Robinson Pierce

Fourier's theorem has all the simplicity and yet more power than other familiar explanations in science. Stated simply, any complex pattern, whether in time…

— Bruce Hood

“Given that sin x = 1⁄4 and x is in Quadrant II, find the exact values of sin2 x and cos2 x WTF. He…

— Brigid Kemmerer

A figure with curves always offers a lot of interesting angles.

— Wesley Ruggles

How easily the routine of sin establishes itself.

— Gunter Grass