Trigonometry

Sine

Definition

For a right triangle, opposite side divided by hypotenuse; also a periodic trigonometric function.

Keep exploring

Use the related CalculatorWiser resources to connect this definition to formulas, examples, and practical calculators.

Search related formulas →Search calculators →
CalculatorWiser

CalculatorWiser offers free online calculators, math tools, calculators with steps, learning resources, reference tables and a growing calculator library for everyday math, finance, science, time, conversions and more.

Free Online CalculatorsCalculators With StepsMath Learning PathsMath Blog
Latest from the Math BlogWho invented mathematics?Euclid: life, ideas, and mathematical legacyWhy zero changed mathematicsMaya mathematics and calendars
Policies & TrustAbout UsContact UsPrivacy PolicyCookie PolicyAdvertising & Affiliate DisclosureTerms of UseDisclaimerEditorial PolicyAccessibilityPrivacy Choices