Many students find **Trigonometry in A Maths challenging**.

This is a **list of Trigonometry Formulas** that I compiled for A Maths. Students in my A Maths tuition class will get a copy of this, neatly formatted into one A4 size page for easy viewing.

**A Maths: Trigonometry Formulas**

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(**A**ll **S**cience **T**eachers **C**razy)

**Special Angles:**

Amplitude: ; Period:

Amplitude: ; Period:

Period:

Area of

**Sine Rule:**

**Cosine Rule:**

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*Related*

What about the memory trick of the famous

Cos 3A = ?

It is good to remember the few common trigonometry formulas. We learned them by heart since Sec 3, they stay in the memory to university and working life, becoming handy when you need them any time (without the calculator or formula handbook)

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