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THE LAW OF SINES
Law of Sines…
Enable us to solve problems on certain
oblique triangles. Oblique triangles are
triangles that do not have any right triangles.
Can be used when one side and any two
angles are given.
Law of Sines…
𝑎
𝑠𝑖𝑛𝐴
=
𝑏
𝑠𝑖𝑛𝐵
=
𝑐
𝑠𝑖𝑛𝐶
In any triangle ABC with sides a, b, and c:
In any triangle, the sides are proportional
to the sines of the opposite angles.
ILLUSTRATION

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8.3 the law of sines