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Sin(x), Cos(x) and Tan(x) are very useful functions and can be used to solve algerbraic problems where the aim is to find the size of an angle or a size. Sin(x) = Opposite/Hypotenuse Cos(x) = Adjacent/Hypote...

Answering essay questions in exams can seem a daunting task, especially in a subject like History, but there really is no need to panic. History exams are all about preparation. There are three simple steps ...

When faced with a problem that involves triangles, there is a simple flowchart you can follow to determine which formula or identity you need to use! Firstly you must ask yourself whether the triangle has a ...

This is a simultanious equation. As there are two unknown variables, it is impossible to find both a and b just using one of the equations. To make it possible to work out the unknowns, we need to have just ...

We can solve simultaneous equations in two different ways. We can either eliminate one of the unknowns or use substitution. It is about finding which method you are most comfortable with and practicing that ...