sine (C1)

noun

Pronunciation: /saɪn/

Definition

A trigonometric function representing the ratio of the opposite side to the hypotenuse in a right triangle.

Examples

• The sine of a thirty-degree angle is exactly one-half.

• Engineers use sine waves to model alternating electrical currents.

• You must calculate the sine of the angle before finding the missing side length.

How to Use sine

sine of (prepositional phrase)

The mathematical function applied to a specific angle. — "Find the sine of 45 degrees."

Synonyms of sine

Words with a similar meaning to sine:

• ratio
• trigonometric function

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