Crossword puzzle clue "1 sec in trig"

Here are the possible solutions for 1 sec in trig clue

Answer
Clue
Relevancy
cosine
Clue
Trig function whose last four letters are another trig function
Definition
a trigonometrical function of an angle
cos
Clue
Reciprocal of sec, in trig
1/sec, in trig
Definition
a crisp, long-leaved lettuce
alg
Clue
Trig. prerequisite
Trig's relative
Trig kin
Trig cousin
Precursor of trig.

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