How to Say "sine" in Spanish
The Spanish word for “sine” is “seno” — C1 level.
English → SpanishC1
nounC1formal
mathematics/trigonometry
Examples
El seno de un ángulo de noventa grados es uno.
The sine of a ninety-degree angle is one.
Estamos estudiando las ondas de seno en clase de física.
We are studying sine waves in physics class.
Technical Gender
In math, 'seno' is always masculine ('el seno'). It follows the same rules as other mathematical functions like 'el coseno' or 'el logaritmo'.
Spelling confusion
Mistake: “Writing 'sino' instead of 'seno' in math.”
Correction: 'Sino' means 'but' or 'fate'. In math, it is always 'seno'.
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