# Reduction Formulae

> Reduction formulae rewrite a trigonometric ratio of a compound angle such as 90°±θ, 180°±θ or 360°±θ as a ratio of the acute angle θ alone, with the correct sign from the quadrant. This section…

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## More in Trigonometry

- [Trigonometric Identities](https://www.hlayiso.com/grade-11/mathematics/notes/trigonometry/trigonometric-identities) — Previous section
- [Trigonometric Equations and General Solutions](https://www.hlayiso.com/grade-11/mathematics/notes/trigonometry/trigonometric-equations-and-general-solutions) — Next section
- [All Trigonometry sections](https://www.hlayiso.com/grade-11/mathematics/notes/trigonometry)

## Frequently asked questions

### What will I learn in "Reduction Formulae"?

This section covers Reduction Formulae as part of Trigonometry in Grade 11 Mathematics. You'll find clear explanations, worked examples, and key definitions aligned to the CAPS curriculum.

### Is this section aligned with the CAPS curriculum?

Yes. All notes on Hlayiso, including "Reduction Formulae", are written against the official CAPS curriculum and ATP for Grade 11 Mathematics.

### What should I study after "Reduction Formulae"?

Continue with the next section in Trigonometry, or test your understanding with the interactive quiz linked to this section.

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