Product ↔ Sum — Trig Converter

Product ↔ Sum — Trigonometric Converter

Product → Sum and Sum → Product. See symbolic identity, substitution and numeric verification (degrees/radians).

Numeric mode

Choose a product identity, optionally enter angles A and B to substitute and compute numeric check.

Choose identity Angle A (example: 30 or Math.PI/6) Angle B (example: 45 or Math.PI/4)

Choose a sum/difference identity, optionally enter angles A and B to substitute and numeric-check.

Choose identity Angle A (example: 30 or Math.PI/6) Angle B (example: 45 or Math.PI/4)