Sine is a math term used in trigonometrythe branch of mathematics that studies angles and side ratios in shapes. It describes the relationshipa connection or way that two or more things are related between an angle in a right trianglea shape with three straight sides and three corners and the lengths of two of its sides.
Reviewed with OpenAI Decisions. Assessment: accurate. Checked: 2026-10-15. AI assessment; not a guarantee of accuracy.
Pronunciation
AI-generated pronunciation audio (OpenAI).
Accent: General American English
IPA: /saɪn/
Easy pronunciation: SINE (approximate spelling).
Stress: Stress the single syllable.
Mathematics: the trigonometric function, not the spelling-related sense.
Reviewed with OpenAI Decisions. Assessment: inaccurate — correction needed. Checked: 2026-10-15. AI assessment; not a guarantee of accuracy.
Sine Meaning
A trig ratio used with angles and right triangles.
Part of speech: noun
Definition: The trigonometric ratio of the length of the side opposite an angle to the length of the hypotenuse in a right triangle.
Example: To find the sine of the angle, divide the opposite side by the hypotenuse.
Synonyms for this meaning:
- sin — Standard abbreviation and exact substitute in trigonometry.
Reviewed with OpenAI Decisions. Assessment: accurate. Checked: 2026-10-15. AI assessment; not a guarantee of accuracy.
Sine Synonyms
Similar Meaning
- sin
Reviewed with OpenAI Decisions. Assessment: accurate. Checked: 2026-10-15. AI assessment; not a guarantee of accuracy.
Common Mistakes
- People sometimes confuse sine with cosine, but they are different trigonometric ratios.
Reviewed with OpenAI Decisions. Assessment: accurate. Checked: 2026-10-15. AI assessment; not a guarantee of accuracy.
Frequently Asked Questions
What does sine mean?
Sine is a trigonometric ratio used in right triangles and angle calculations.
What is a synonym for sine?
The main synonym is sin, the common abbreviation used in math.
Is sine the same as sin?
Yes. In trigonometry, sin is the standard abbreviated form of sine.
Reviewed with OpenAI Decisions. Assessment: accurate. Checked: 2026-10-15. AI assessment; not a guarantee of accuracy.
