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# Trigonometry

Trigonometry can be used to help us find the Angles and distances of triangles. In GCSE Mathematics, you will have come across   sine, cosine   and   tangent   - Functions that come from the Angles and distances of a right-angled triangle. Three other Functions are the reciprocals of these familiar FunctionsThey are  secant  (sec),  cosecant  (cosec) and  cotangent  (cot) respectively.

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What is trigonometry?

Trigonometry is a mathematical topic which looks at the relationship between angles and distances.

Who invented trigonometry?

Trigonometry was invented in Greece. The word comes from trigon, which means triangle and metron, which means to measure.

How do you find an angle using trigonometry?

To find an angle using trigonometry, you use the inverse function of either sin, cos or tan, also known as sin-1, cos-1 and tan-1.

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