# Trigonometry - Edexcel

The three trigonometric ratios; sine, cosine and tangent are used to calculate angles and lengths in right-angled triangles. The sine and cosine rules calculate lengths and angles in any triangle.

## Trigonometry

### 1

What is the name for the side y in this triangle?

### 2

Which trigonometric ratio should be used to find the length of the adjacent side?

### 3

Which trigonometric ratio calculates the sin of x?

### 4

Which trigonometric ratio should be used to find the length of y?

### 5

Which calculation shows the correct working to find y?

### 6

What is the length of y?

### 7

Which calculation shows the correct working to find the size of angle x?

### 8

What is the size of angle x?

### 9

What is the name of this trigonometric graph?

### 10

What is the trigonometric formula for the area of any triangle?