Branch of Mathematics Once Called the Rule of Coss

This page is the CodyCross answer for the clue below from Treasure Island, Group 1022, Puzzle 5 (Treasure Map).

Question is: Branch of Mathematics Once Called the Rule of Coss

and the answer is: ALGEBRA

Word Meaning:

ALGEBRA — (uncountable, mathematics) Elementary algebra: A system for representing and manipulating unknown quantities (variables) in equations.

Definitions from Wiktionary.

Branch Of Mathematics Once Called The Rule Of Coss - Treasure Island CodyCross Answers | CodyCross Solutions