What is "cosines"

Usage examples of "cosines".

Daniel passes an extraordinarily pleasant half-hour turning Dappa’s steady observations into sines and cosines, conic sections and fluxions.

These machines had left far behind such elementary operations as integration, such kindergarten functions as cosines or logarithms.

Woolsey stressing the significance of cosines, which he'd pronounced "cousins," and Lottie Estes explaining the role of potholders in a well-organized kitchen.

He said more, about slighter turns and sines and cosines: Turk didn't seem to get it any better than Zelde did.