In `DeltaABC` if the angle A, B, C are in A.P. then `(a+c)/sqrt(a^2-ac+c^2)=`

In a Delta ABC ,if angle, A,B,C are in A.P then (a+c)/(sqrt(a^(2)-ac+c^(2) 1.cos((A-C)/(2)) 2. 2cos((A-C)/(2)) 3. 2sin((A-C) 4. 2cos(A+C)

In Delta ABC , if A,B,C are in A.P then (a+c)/sqrt(a^2-ac+c^2)=

In Delta ABC , if A,B , C are in A.P. The (a+c)/( sqrt(a^(2) -ac + c^(2))

If the angle A,B,C of a DeltaABC are in A.P then

If angles A,B,C are in A.P . , then 2cos (( A-C)/( 2))=

In a DeltaABC the angles A, B, C are in A.P. show that 2cos""(A-C)/2=(a+c)/sqrt((a^(2)-ac+c^(2)))

If the angles of the DeltaABC are in A.P., then a^(2)+c^(2)-ac=

In triangle ABC if the angles A,B and C be in A.P. then show that 2cos ((A-C)/2)=(a+c)/sqrt(a^2-ac+c^2)

In a DeltaABC, angles A,B,C are in A.P. Then lim_(A to C)sqrt(3-4sinAsinC)/abs(A-C) is