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In a triangleABC, " if "(sin A)/(sin C)=...

In a `triangleABC, " if "(sin A)/(sin C)=(sin(A-B))/(sin (B-C))," prove that "a^(2),b^(2),c^(2)` are in Artithmetic Progression.

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`a^(2), b^(2), c^(2)`
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