- In physics, maths is used as a tool to solve problems related to the relationships between quantities.
- Without basic maths skills you could still understand some concepts but would not be able to solve problems.
- Sometimes the language of maths is used to explain and describe not just perform calculations.
*Qualitative*descriptions of data include the direction and relationship in which two variables change (e.g. as time increases, distance increases proportionally).*Quantitative*descriptions of data include numerical values (e.g. the speed of the object is 5ms^{-1}).- Graphs are visual representations used to represent relationships.

### Non-linear graphs

Some common non linear graphs.

### Linear graphs

Interpreting the gradient and intercept of straight line graphs

### Radians

How the radian is defined and why the angle is the same as the sin of the angle for small angles

### Pythagoras and trigonometry

exercises and tutorials

### Simultaneous equations

Particularly useful when solving circuit problems using Kirchoff´s laws, how to solve for two unknowns when you have two equations.

### Substitution

Some examples of how to substitute from one equation into another