Question

Can someone please answer this for me

Answer 1

Answer:

BC = 1.7

Step-by-step explanation:

Since, cosine of any angle (except right angle) represents the ratio of base length and hypotenuse.

Cosθ = $\frac{\text{Base}}{\text{Hypotenuse}}$

From the given right triangle ΔACB,

$\text{Cos}(\angle B) = \frac{\text{Base}}{\text{Hypotenuse}}$

              $=\frac{BC}{AB}$

Cos(70°) $=\frac{BC}{5}$

BC = 5Cos(70°)

     = 1.71

     ≈ 1.7