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altavistard
We're concentrating on "2 sides and the included angle."  
                       adj side         x
cos 28 deg = ------------ = -----------
                          hyp          64 km

Solving for x, we get:     x = (64 km)cos 28 deg

Find cos 28 deg with a calculator and then mult. your result by 64 km.  That will give you "x."

The value of x in a given triangle is 56.50km.

We have given the diagram,

We're concentrating on 2 sides and the included angle.

What is the formula for the cos theta?

[tex]cos\theta=\frac{adjucent}{hypotenuse}[/tex]

 

cos 28 deg  = adj side/hyp =x /64 km

Solving for x, we get x = (64 km)(cos 28 deg)

x=56.50

Find cos 28 deg with a calculator and then multiply.

your result by 64 km.  That will give you x.

Therefore the value of x is 56.50km.

To learn more about the triangle visit:

https://brainly.com/question/17335144

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