In a triangle ABC tan 4 = and tan = If a,b,c, are the lengths of...

 

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In a triangle ABC tan 4 = and tan = If a,b,c, are the lengths of 20 37 sides and s is its semi perimeter then (A) a,b,c are in A.P (B) cos C 21 29 (C) 2s=3b (D) tan 을 = In a triangle ABC tan 4 = and tan = If a,b,c, are the lengths of 20 37 sides and s is its semi perimeter then (A) a,b,c are in A.P (B) cos C 21 29 (C) 2s=3b (D) tan 을 =