Trigonometry Words
In short: Trigonometry vocabulary: 21 terms on sine, cosine, tangent, radians, the unit circle, identities, and the laws of sines and cosines, each defined in plain words with a numeric example for fast review.
Hypotenuse, opposite, adjacent, sine, radian, reference angle, amplitude, period, identity, inverse trig function: the trigonometry vocabulary on this page covers the words from right triangles to the unit circle and waves. Each entry gives a short definition and a computed example, such as the sine of a familiar angle.
Reach for it when a problem asks you to “convert to radians” or “state the period,” and you want to confirm the term before calculating. Printing the list helps with a unit test: cover the definitions, explain each word aloud, and note the ones that need another look with a worksheet of problems.
21 words on this page, each with a definition, a figure, a solved example and two quick questions.
Trigonometry Words: the full list
Geometry
- Angle of Elevation and Depression
- Cosine
- Law of Cosines
- Law of Sines
- Radian
- Sine
- SOHCAHTOA
- Special Right Triangles
- Tangent (Trigonometric Ratio)
Algebra 2
- Amplitude
- Coterminal Angles
- Midline
- Period of a Function
- Pythagorean Identity
- Reference Angle
- Unit Circle
Precalculus
- Double-Angle Formulas
- Inverse Trigonometric Functions
- Phase Shift
- Sum and Difference Formulas
- Trigonometric Identities