# Resources tagged with: Sine, cosine, tangent

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### There are 6 results

Broad Topics > Pythagoras and Trigonometry > Sine, cosine, tangent

### Lying and Cheating

##### Age 11 to 14 Challenge Level:

Follow the instructions and you can take a rectangle, cut it into 4 pieces, discard two small triangles, put together the remaining two pieces and end up with a rectangle the same size. Try it!

### Making Maths: Clinometer

##### Age 11 to 14 Challenge Level:

You can use a clinometer to measure the height of tall things that you can't possibly reach to the top of, Make a clinometer and use it to help you estimate the heights of tall objects.

### History of Trigonometry - Part 3

##### Age 11 to 18

The third of three articles on the History of Trigonometry.

### History of Trigonometry - Part 2

##### Age 11 to 18

The second of three articles on the History of Trigonometry.

### The History of Trigonometry- Part 1

##### Age 11 to 18

The first of three articles on the History of Trigonometry. This takes us from the Egyptians to early work on trigonometry in China.