Question

in triangle ABC if angleA is equal to angle B then what is AB:BC

Answer 1

a bc =AB:BC:CA BECAUSE A TRIANGLE

Answer 2

Answer:

2 cos A

Step-by-step explanation:

in a triangle ABC let angle A= angle B=x and we know sides are equal if angles are equal. so let BC=AC=y

then by sine rule

a/sin A=b/sin B=c/sin C

⇒a/sin A=c/sin C

⇒BC/sin x=AB/sin C

⇒AB/BC=sin C/sin x

⇒AB/BC=sin (180-2x)/sin x

⇒AB/BC= sin 2x/sin x

⇒AB/BC=2 sin X* cos x/sin x

⇒AB/BC=2 cos x