Trigonometer

The Trigonometer is a precision-crafted unit circle manipulative that displays all six trigonometric ratios simultaneously (sine, cosine, tangent, cosecant, secant, and cotangent), updating in real time as students rotate the angle arm.

Students can explore the unit circle, investigate how trig ratios change across all four quadrants, discover reference angles, and see exactly why certain values are positive or negative, all at a glance. Learners can examine special angles, connect degree and radian measures, work backwards from ratio values to find their angles, and build lasting intuition for a subject that trips up even strong math students.

Designed to make abstract relationships concrete and visual, the Trigonometer bridges the gap between memorization and true understanding. Whether students are meeting trig for the first time or preparing for precalculus, calculus, or standardized tests, the Trigonometer gives them a physical anchor for one of math's most notoriously difficult topics.

Perfect for individual practice, small-group exploration, and whole-class demonstration. Supports hands-on learning aligned to standards for trigonometry, the unit circle, and function reasoning.

The Trigonometer makes trig click by adding an element of kinetic magic.