If in a `DeltaABC`, the altitudes from the vertices A, B, C on opposite sides are in H.P, then sin A, sin B, sin C are in

IF in a Delta ABC , the altitudes from the vertices A,B,C on opposite sides are in H.P , then sin A , sin B , sin C are in

If in a DeltaABC, the altituds drawn from the vertices A,B, C on opposite sides are in H.P., then sin A, sin B, sin C are in-

If in a !ABC , the altitudes from the vertices A , B , C on the opposite sides are in H.P., then sin A, sin B , sin C are in

If in a Delta ABC, the altitudes from the vertices A,B,C on opposite sides are in H.P.then sin Asin B, sin C are in

If in a DeltaABC , the altitudes from the vertices A,B,C on opposite sides are in H.P., then sinA,sinB,sinC are in

If in a triangle ABC, the altitudes from the A,B,C on opposite sides are in H.P. then sinA, sin B, sin C are in

If in a /_\ ABC the altitude from the vertices A,B,C on opposite side are in H.P. then sinA,sinB,sinC are in (A) H.P. (B) Arithmetico-Geometric progression (C) A.P. (D) G.P.

If the sides a ,b ,c of a triangleABC are in HP, prove that sin^2A/2,sin^2B/2,sin^2C/2 are in HP

In any DeltaABC , sin A + sin B + sin C =