Respuesta :

Answer:

I think it would be 70.5288 or 70.5º

Step-by-step explanation:

You would have to do the same thing you did for your last problem.

If X is the opposite of your hypotenuse then you would have to do inverse cos [a^2 +b^2 -c^2 all divided by 2ab]

so you would have the inverse cos of [20^2 +18^2 -22^2 divided by 2(20)(18)] which would give you 70.5º.

I hope this helped a little bit. Im sorry if it's wrong.

Answer:

X ≈ 70.5°

Step-by-step explanation:

Using the cosine rule in Δ XYZ

cosX = [tex]\frac{y^2+z^2-x^2}{2yz}[/tex] ← substitute values

        = [tex]\frac{20^2+18^2-22^2}{2(20)(18)}[/tex]

        = [tex]\frac{400+324-484}{720}[/tex] = [tex]\frac{240}{720}[/tex], thus

X = [tex]cos^{-1}[/tex]([tex]\frac{240}{720}[/tex]) ≈ 70.5°

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