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 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 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 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 b=(sqrt(3)-1)a and /_C=30^(@), then the value of (A-B) is equal to(All symbols used have usual meaning in a triangle..

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

In Delta ABC, if a=13 ,b=14 , c=15 , then r_1=

In Delta ABC, if a= 13, b= 14, c= 15 , then r_2 =

In DeltaABC," if " A-B=120^(@) and R=8r , then the value of (1+cosC)/(1-cosC) equals : (All symbols used hav their usual meaning in a triangle)

In DeltaABC," if " A-B=120^(@) and R=8r , then the value of (1+cosC)/(1-cosC) equals : (All symbols used hav their usual meaning in a triangle)

In a DeltaABC , if b =(sqrt3-1) a and angle C=30^(@), then the value of (A-B) is equal to (All symbols used have usual meaning in the triangel.)