circular function

NOUN /sɜrkjələr_'fəŋkʃən/
17 LETTERS · 4 SYLLABLES · STARTS WITH C

circular function is a valid 17-letter word worth 25 points in Scrabble and 33 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS
C3I1R1C3U1L1A1R1F4U1N1C3T1I1O1N1
3 + 1 + 1 + 3 + 1 + 1 + 1 + 1 + 0 + 4 + 1 + 1 + 3 + 1 + 1 + 1 + 1 =25 PTS
DOUBLE WORD → 50TRIPLE WORD → 75
MEANING

What does circular function mean?

NOUN · 1 SENSE
1

Function of an angle expressed as a ratio of the length of the sides of right-angled triangle containing the angle.