# Trigonometry

## Vectors

A vector quantity has both size and direction.There's a few way vectors are written. For example if a vector goes 3 units right and 4 units up, is called a and ...

## 3D Trigonometry

Trig can look really scary in 3D....but if you keep calm and simplify it by drawing it as 2D shapes you'll be rewarded with an A*. Example: ABCDEFGH is a cub...

## Pythagoras’ Theorem

This only works for right angled triangles!Examiners love to give you "distance between two points" questions that involve this theorem. Example: Find the di...

## Sin, Cos, Tan

There's three different sides to a triangle: The hypotenuse is the longest side The opposite is the side opposite to the angle being used in the question ...

## The Sine and Cosine Rules

SOH CAH TOA applies to right angled triangles....but when you have other triangles the sine and cosine rules come into play. In the following formulae the trian...

## 3D Pythagoras

With 3D shapes sometimes you need to use Pythagoras more than once to find a particular length.CuboidsThere's a formula in cuboids for finding the length of the...