What belongs in trigonometry charts
Trigonometry charts are for exact values, angle identities, formula families, sign rules, unit-circle reasoning, and visual comparisons of trig functions.
Use charts with written work
A formula chart helps students choose the right identity, but each solution still needs the chosen formula, substitution, simplification, and a sign or range check.
Good classroom uses
Print trigonometry charts for identity proofs, exact-value practice, notebook inserts, tutoring sessions, and quick formula review before independent work.