Triangulation

Puzzle makers Sylvia Bursztyn and Barry Tunick are usually quite knowledgeable in their science-related clues, but in their March 18 crossword they had a little math confusion.

The common clue for 35 and 77 across was “geometry abbr.� The answers were COS (for cosine) and COSEC (for cosecant). However, these two terms are used in trigonometry, not geometry.

JOHN LANE

Stanton