" In a "/_ABC,2cos((A-C)/(2))=(a+c)/(sqrt(a^(2)+c^(2)-ac))," then "

In /_ABC,cos((B+C)/(2))

In Delta ABC, if A+C=2B, prove that 2cos((A-C)/(2))=(a+c)/(sqrt(a^(2)-ac+c^(2)))

In DeltaABC , if 2 cos ((A-C)/2) = (a+c)/sqrt(a^2 -ac+c^2) [Note: All symbols used have their usual meaning in triangle ABC]

In a triangle,if the angles A,B, and C are in A.P.show that 2cos(1)/(2)(A-C)=(a+c)/(sqrt(a^(2)-ac+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)))

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)

If Delta ABC,quad if (cos A)/(2)=sqrt((b+c)/(2c)), then

If in a triangle ABC,b cos^(2)((A)/(2))+a cos^(2)((B)/(2))=(3)/(2)c then a,c,b are:

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