Step-by-step explanation:
[tex] \sin A = \frac{BC}{AB} = \frac{20}{25} = \frac{4}{5} \\ [/tex]
Answer:
[tex]\frac{4}{5}[/tex]
[tex]sinA = \frac{BC}{BA} = \frac{20}{25}=\frac{20:5}{25:5}=\frac{4}{5}[/tex]
