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Dmitriy789 [7]
3 years ago
11

Can someone please answer this for me

Mathematics
1 answer:
MaRussiya [10]3 years ago
8 0

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

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