Answer:
Step-by-step explanation:
Triangle ABC is a right angle triangle.
From the given right angle triangle,
AB represents the hypotenuse of the right angle triangle.
With m∠B as the reference angle,
BC represents the adjacent side of the right angle triangle.
AC represents the opposite side of the right angle triangle.
To determine Sine ∠B, we would apply the Sine trigonometric ratio.
Sin θ = opposite side/adjacent side. Therefore,
Sin B = 4/5 =
SinB = 0.8