Trigonometry

Sine, Cosine, Tangent

The basic trigonometric ratios relate angles to sides of right triangles.

Open Sine Calculator Practice this

On this page

Key formulasKey conceptsWorked examplesCalculators

Key Formulas

Sine

SOH

Cosine

CAH

Tangent

TOA

Key Concepts

SOH CAH TOAUnit circleReference anglesSpecial triangles

Worked Examples

1
Solution:

Calculators for this topic

Work through your own numbers with step-by-step solutions.

Sine CalculatorCosine CalculatorTangent CalculatorTrigonometry Solver

Related Formulas & Theorems

Trigonometry

Definitions (SOH-CAH-TOA)

Geometry

Circle area

Geometry

Circle circumference

Trigonometry

Angle sum (sine)

Ready to practice?

Test your understanding with generated practice problems and instant feedback.

Start Practicing

Related Topics

Trigonometric Identities

Trigonometric identities are equations involving trigonometric functions that are true for all values.

Inverse Trigonometric Functions

Inverse trig functions find the angle given a trig ratio.

PreviousTrigonometric IdentitiesNextInverse Trigonometric Functions
Browse all topics