# Sine rule, cosine rule and area rule

> Not every triangle contains a right angle. When working with oblique (non-right-angled) triangles, trigonometric ratios alone are not sufficient. We need three powerful rules: the sine rule, the…

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## Full notes

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## More in Trigonometry

- [Trig ratios in all four quadrants](https://www.hlayiso.com/grade-11/technical-mathematics/notes/trigonometry/trig-ratios-in-all-four-quadrants) — Previous section
- [Two-dimensional trigonometry problems](https://www.hlayiso.com/grade-11/technical-mathematics/notes/trigonometry/two-dimensional-trigonometry-problems) — Next section
- [All Trigonometry sections](https://www.hlayiso.com/grade-11/technical-mathematics/notes/trigonometry)

## Frequently asked questions

### What will I learn in "Sine rule, cosine rule and area rule"?

This section covers Sine rule, cosine rule and area rule as part of Trigonometry in Grade 11 Technical 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 "Sine rule, cosine rule and area rule", are written against the official CAPS curriculum and ATP for Grade 11 Technical Mathematics.

### What should I study after "Sine rule, cosine rule and area rule"?

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

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