- (in a right triangle) the ratio of the side opposite a given acute angle to the hypotenuse.
- (of an angle) a trigonometric function equal to the ratio of the ordinate of the end point of the arc to the radius vector of this end point, the origin being at the center of the circle on which the arc lies and the initial point of the arc being on the x-axis. Abbreviation: sin
WHO SAID IT: A QUIZ ON PRESIDENTIAL WIT AND WISDOM
Origin of sine
Words nearby sine
Example sentences from the Web for sine
That accumulation of identities is already a sine qua non when speaking of Hispanics, like Zimmerman.George Zimmerman, Hispanics, and the Messy Nature of American Identity|Ilan Stavans|April 6, 2012|DAILY BEAST
In the land of the industrial revolution, foreign ownership and management is the sine qua non of industrial success.
This unsmoked, wet-cured ham is the sine qua non of Parisian butcher shops: a light, ephemeral meat, sweet but umami.
What a fool I had been not to have actually made the removal of them a sine qua non before I signed the contract!Man and Maid|Elinor Glyn
Sound teeth—exceptionally large—and tight lips are a sine qua non.Sporting Dogs|Frank Townend Barton
Sine wondered vaguely that they should cling to such an unhappy existence.The Metal Moon|Everett C. Smith
The American commissioners seem to have been startled out of their composure by this sine qua non.Jefferson and his Colleagues|Allen Johnson
Edwards was depending upon this library to support himself and wife, and the weekly check was a sine qua non.The Fiction Factory|John Milton Edwards
British Dictionary definitions for sine (1 of 2)
noun (of an angle)
- a trigonometric function that in a right-angled triangle is the ratio of the length of the opposite side to that of the hypotenuse
- a function that in a circle centred at the origin of a Cartesian coordinate system is the ratio of the ordinate of a point on the circumference to the radius of the circle