Activities
Trigonometry - sine rule
The sine rule is used in triangles that are not right angled when:
two angles and one side are known two sides and a non included angle are known.
Demonstration of the sine rule - uses the idea of finding the height of a triangle in two different ways.
When two sides and a non included angle are known, it may be possible to find two different triangles. This is called the ambiguouscase.
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