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If in a triangle P Q R ,sinP ,sinQ ,sinR...

If in a triangle `P Q R ,sinP ,sinQ ,sinR a r e i n AdotPdot` , then (a)the altitudes are in A.P. (b)the altitudes are in H.P. (c)the medians are in G.P. (d)the medians are in A.P.

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