If sides `a,b,c ` of the triangle ABC are in A.P, then prove that `sin^2(A/2)cosec2A ;sin^2(B/2)cosec2B ;sin^2(c/2)cosec2c` are in H.P.

If sides a , b , c of the triangle A B C are in AdotPdot , then prove that sin^2A/2cos e c\ 2A ;sin^2B/2cos e c\ 2B\ ;sin^2C/2cos e c\ 2C are in H.P.

If sides a,b,c of Delta ABC are in A.P., then : sin (A/2) cdot sin (C/2)/(sin (B/2) =

If the side lengths a,b and c are in A.P. then prove that cos ((A-C)/2) = 2sin (B/2)

In a triangle ABC, prove that :a sin((A)/(2)+B)=(b+c)sin((A)/(2))

In triangle ABC if a, b, c are in A.P., then the value of (sin.(A)/(2)sin.(C)/(2))/(sin.(B)/(2)) =

In triangle ABC if a, b, c are in A.P., then the value of (sin.(A)/(2)sin.(C)/(2))/(sin.(B)/(2)) =

For triangle ABC prove that sec((A+B)/2)="cosec"C/2

In triangle ABC , prove that b^2sin2C+c^2sin2B=2bcsinA .

In Delta ABC , if a,b,c are in A.P, then cos((A-C)/2)cosec(B/2)=

If the sides a,b and C of o+ABC are in A.P.,prove that 2sin(A)/(2)sin(C)/(2)=sin(B)/(2)a cos^(2)(C)/(2)+cos^(2)(A)/(2)=(3b)/(2)