please helpppp meeeeee

Step-by-step explanation
tan∞20° = BC÷ BA = 3 ÷ BA
tan∞20°°= 3÷ BA
÷ by BA
⇒Tan∞20°BA= 3
÷ BY tan∞20°
tan∞20°BA÷tan20°BA= 3÷tan∞20°BA
BA= 3÷TAN∞20°BA
BA= 8.24