[" 33.If in a triangle (scalene) "ABC" ,"],[qquad [" cos "B+cos C=4sin^(2)((A)/(2))" ,then "b,a,c" are in "],[" (1) A.P."],[" (3) H.P."]]

In Delta ABC if cos A+cos C=4sin^(2)((B)/(2)) then a,b,c will be in

In a Delta ABC, if cos A+cos B=4 sin^(2)((C)/(2)), then a,b,c are in (a) AP (b) GP (c) HP (d) None of these

If cos A+cos B=4sin^(2)((C)/(2)) then prove that sides a,c,b of an triangle ABC in A.P.

In a Delta ABC, c cos^2 A/2+a cos^2C/2=(3b)/(2) then show a,b,c are in A.P

In a Delta ABC, c cos^2 A/2+a cos^2C/2=(3b)/(2) then show a,b,c are in A.P

If in a triangle ABC,a cos^(2)((C)/(2))ccos^(2)((A)/(2))=(3b)/(2), then the sides a,b, and c are in A.P.b.are in G.P.c. are in H.P.d.satisfy a+b=c.

In a triangle ABC if a cos^2(C/2)+c cos^2(A/2)=((3b)/2) show that sides of the trianglea are in A.P.

In /_ABC if 2c cos^(2)((A)/(2))+2a cos^(2)((C)/(2))-3b=0 prove that a b,c are in A.P.

In any triangle ABC, prove that: a cos A+b cos B+c cos C=2a sin B sin C

If in a triangle ABC, sin A, sin B, sin C are in A.P, then