In `triangleABC`, if `a=13, b=14, c=15`, then cosB=

In triangleABC , if a=13, b=14, c=15 , then sinA=

In triangleABC , if a=13, b=14, c=15 , then cos((A)/(2))=

In triangle ABC, if a=13,b=14,c=15 then r_(1)=

In triangleABC , if a=13, b=14, c=15 , then A(triangleABC)=

In triangleABC , if a=13, b=14, c=15 , then tan((A)/(2))=

In triangle ABC , if a=13,b=14 and c=15 , then sin.(A)/(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 Delta ABC, if a=13, b=14, c=15 then r_2=

If a = 13, b = 14 , c= 15 then r=

In the triangle A B C, a=13, b=14, c=15 then sin (A)/(2)=