AQA A-level Maths Cosine
This page covers the following topics:
Cosine of an angle is a ratio between the side adjacent to the angle and the hypotenuse of a triangle.
Cosine is one of three trigonometric functions of an angle.
cos(x) is found by calculating the ratio of two sides of a right-angled triangle, the adjacent and the hypotenuse.
The diagram shows a cosine graph.
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