# GCSE Maths

**Probability III – Probability Spaces & Probability Trees**

A further look at multiple probabilities, now we study ways of representing date using Probability Spaces and Probability Trees .

**Probability II – Multiple Events**

Moving on from the basics, now we take a look at multiple events, and the ways in which we can work with these.

**Probability I – The Basics**

Introduction to the basics of probability. The study of chance and probability has been used for thousands of years, especially when winning money's involved!

**Trigonometric Graphs**

A detailed look at the graphs of the Sine, Cosine and Tangent Functions.

**Cosine Rule**

In addition to the Sine Rule, we also have another Trigonometrical Formula we can use to help find the lengths of sides and size of angles, This is called the Cosine Rule.

**Sine Rule**

As well as the usual Sine, Cosine and Tangent Formulas for right angled triangles, there's also a handy little formula that you can use for any triangle. This is known as the Sine Rule and can be used to find the size of the angles or the lengths of a side.

**Area of a Triangle using Sine**

It's easy to work out the area of a simple right angled triangle. But what do you do when you're faced with an irregular shaped triangle. Read on to find out.

**Pythagoras’ Theorem**

Pythagoras' Theorem is one of the oldest and well known theorems known today. The reason for this is probably how simple, yet extremely useful it is in so many branches of Mathematics.

**Deriving the Quadratic Formula**

An extra article taking a look at how the famous Quadratic Formula is calculated.

**Solving Quadratic Equations**

Solving Quadratic Equations is probably the most important skill to master in Maths. Learn how to using a variety of methods.