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If in a DeltaABC, sin A: sin C = sin (...

If in a `DeltaABC,`
`sin A: sin C = sin (A - B): sin (B-C),` then `a^(2), b^(2), c^(2)`are in

A

A.P.

B

G.P.

C

H.P.

D

none of these

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