trigonometry (1 of 2: exploring the connection between ratio of sides on different triangles)
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![a-level maths e1-12 [trigonometry: find all the missing sides and angles of a triangle]](https://i.ytimg.com/vi/cWqGbqi8-mM/mqdefault.jpg)
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a-level maths e1-12 [trigonometry: find all the missing sides and angles of a triangle]