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.)

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

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.)

In a triangle ABC, let a=6,b=3 and cos(A-B) =4/5 [Note: All symbols used have usual meaning in a triangle.] .Statement 1: angleB=pi/2 Statement 2: sin A = 2/sqrt5

In a triangle ABC, 2ac sin ((A-B+C)/2) =

In a triangle ABC, if a=4,b=8,/_C=60^(@), then which of the following relations is (are) correct? [Note: All symbols used have usual meaning in triangle ABC.

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