Respuesta :

Answer:

Step-by-step explanation:

use the below to remember how to use trig functions ( copy this to your computer  for use later )

Use SOH CAH TOA to recall how the trig functions fit on a triangle

SOH: Sin(Ф)= Opp / Hyp

CAH: Cos(Ф)= Adj / Hyp

TOA: Tan(Ф) = Opp / Adj

We can use TOA to find AC

Tan(31) = Opp / 9

9* Tan(31) = Opp   ( Opp = AC)

5.407745571 = AC