Question

Please help me with this question!

Answer 1

Answer: C) 12.2

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Explanation:

We have a known adjacent side (10) and an unknown hypotenuse (x). The cosine rule ties the two sides together.

cos(angle) = adjacent/hypotenuse

cos(35) = 10/x

x*cos(35) = 10

x = 10/cos(35)

x = 12.2077458876146 approximately

x = 12.2

Make sure your calculator is in degree mode.

Answer 2

Answer:

$\boxed{12.2}$

Step-by-step explanation:

cos θ = $\frac{adjacent}{hypotenuse}$

The hypotenuse of the triangle is x.

cos (35) = $\frac{10}{x}$

x = $\frac{10}{cos(35)}$

x = 12.20774588...

x ≈ 12.2