Trig function (4 letters)

{ Answer }

SINE

{ Related Clues }

___ die
___ wave
Cosecant's reciprocal
Geometer's term
Kind of curve
Kind of wave
Math function
Math ratio
___ qua non
Triangle ratio
Trig ratio
Trig word
Trigonometric function
Trigonometrical function
Trigonometry function
Trigonometry term
Type of curve
Without: Lat.
Fourier series function
___ qua non (necessity)
Right-triangle ratio
Ratio of AB to BC, say

{ Tags }

cosecants, curve, die, function, kind, lat, math, mathematical, necessity, non, qua, ratio, sine, term, triangle, trig, trigonometric, trigonometry, wave, without, word

{ Notes }

The answer SINE is seen frequently, appearing about once every 100 puzzles.

{ Definition }

SINE as a noun:

1. (sine, sin) = ratio of the opposite side to the hypotenuse of a right-angled triangle