This clue appeared in the NYT Crossword on Sunday, December 28, 2025 (81 Across). The answer is hidden below until you want it. Sunday puzzles are large (21 by 21) and themed, about as hard as a Wednesday or Thursday.
Answer length: 5 squares
First letter
C _ _ _ _
First and last letters
C _ _ _ C
Show the answer
About the answer
COSEC as a word: ratio of the hypotenuse to the opposite side of a right-angled triangle.
COSEC has been an answer 2 times in the NYT Crossword and Mini since December 28, 2025.
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