`" Let "a,b,c" are the sides of "a" triangle "ABC" and "are" in "A" .P."(" Arithmetic Progression).
"`. `" If "altmin{b,c}" then cosA may be equal to [Note: All symbols used have their usual meaning in triangle "ABC"`

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 DeltaABC, if a=13, b=14and c=15, then angle A is equal to (All symbols used have their usual meaning in a triangle.)

In a triangle ABC, if a=13,b=14 and c=15, then angle A is equal to (All symbols used have their usual meaning in a triangle.)

If the sides a,b and c of a triangle ABC are in A.P.then (b)/(c) belongs to

Three angles A,B,C( taken in that order ) of triangle ABC are in arithmetic progression.If a^(2)+b^(2)-c^(2)=0 and c=2sqrt(3), then the radius of circle inscribed in triangle ABC is equal tolNote: All symbols used have usual meaning in triangle ABC.

If a,b,c are sides of Delta ABC are in A.P.then

In DeltaABC, if 2b =a+ c and A-C=90^(@), then sin B equal All symbols used have usual meaning in Delta ABC.]

The sides a, b, c of a triangle ABC are in arithmetic progression and 'a' is the smallest side. What is cos A equal to ?

Let a,b,c be the sides of a triangle ABC, a=2c,cos(A-C)+cos B=1. then the value of C is