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insens350 [35]
3 years ago
10

Find Y. Round to the nearest tenth. Y= ? Degrees

Mathematics
2 answers:
lana66690 [7]3 years ago
4 0

Answer:

Y = 59.0°

Step-by-step explanation:

Using the cosine rule in terms of x, y and z

cosY = \frac{x^2+z^2-y^2}{2xz}

with x = 22, y = 20 and z = 18

cosY = \frac{22^2+18^2-20^2}{2(22)(18)}

        = \frac{484+324-400}{792}

        = \frac{408}{792}, thus

Y = cos^{-1} (\frac{408}{792} ) ≈ 59.0° ( to the nearest tenth )

torisob [31]3 years ago
3 0
<h2>Answer: <u><em>I think this is the right answer Y = 59.0°</em></u></h2><h2><u><em /></u></h2><h2>Step-by-step explanation: </h2><h2><u><em>And also I hope this one helps</em></u></h2>

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