Linked from

The 13 pages that link to Law of sines, each with the reason it gives.

• Pythagorean theoremCompared with: It handles arbitrary triangles through angle-side ratios rather than the theorem’s right-angle square relation.

• TriangleRelated: It converts known side-angle pairs into unknown sides or angles.

• Law of cosinesCompared with: It is often more direct when an opposite side-angle pair is known.

• CircumcircleRelated: It gives the circumradius as a side divided by twice its opposite angle’s sine.

• Ptolemy's theoremCompared with: It relates sides and angles within a triangle rather than opposite sides and diagonals of a cyclic quadrilateral.

• Angle bisector theoremRelated: Applying it to the two triangles formed by a bisector gives another proof of the proportionality.

• History of trigonometryRelated: This rule extended angle-and-side calculation beyond right triangles.

• Morley's trisector theoremRelated: Sine-based length relations often simplify calculations involving trisector intersections.

• Bottema's theoremRelated: It translates triangle side ratios into angle expressions used in metric proofs.

• Constant chord theoremRelated: Applied to a triangle formed by two radii, it expresses chord length from the subtended angle.

• Lami's theoremRelated: Applying it to the force triangle yields the theorem's force-to-sine ratios.

• Law of cotangentsCompared with: It relates sides to angles, whereas the cotangent law uses only the three angles.

• Mollweide's formulaRelated: Replacing side lengths with opposite-angle sines gives a direct route to both identities.