Respuesta :
Let's assume
reference angle =B
so,
opposite =b
adjacent=a
now, we can use tan
[tex]tan(B)=\frac{b}{a}[/tex]
now, we can solve for b
Multiply both sides by a
[tex]a*tan(B)=a*\frac{b}{a}[/tex]
[tex]b=a*tan(B)[/tex]
so, option-A...............Answer