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Guide to Game Development/Theory/Mathematics/Trigonometry/Trigonometry used with non-right angles

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An example of a triangle with sides a, b and c and with angles A, B and C.


For non-right-angled triangles, there are two rules that you can use:

Sine Rule -

For finding sides:


Rearranged for finding angles:

Cosine Rule -

For finding sides:




Rearranged for finding angles: