Respuesta :

Answer:

3/5

Step-by-step explanation:

sinA = opposite/hypotenuse = BC/AC = 21/35 = 3/5

Here,

h = 35

p = 28

b = 21

SinA = ?

Now,

SinA = p/h

= 28/35

= 4/5

I hope you understand...

It is a Right answer...

Thanks