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Sagot :
The distance from the second destination back to Dallas is 918 miles
Given
A triangle has points Dallas, destination 1, and destination 2.
The distance from Dallas to destination 1 is 720 miles
The distance from destination 1 and destination 2 is 290 miles
the angle formed between Dallas, destination 1, and destination 2 is 125 degrees.
He moves from destination 1 to Dallas then destination 2
We could use cosine law to find the distance
What is cosine law?
The Law of cosines or cosine law means the relation between the length of sides of a triangle with respect to the cosine of its angle. It is also called the cosine rule
[tex]b^{2}=a^2+c^2-2ac*cosB[/tex]
=[tex]290^2+720^2-2*720*290*cos125[/tex]
=84100+518400-417600 cos 125
=602500-417600*(-0.5735)
=602500+239493.6
=841993.6
b=917.6 miles
≅918 miles
The distance is 918 miles he will fly from the second destination back to Dallas
Learn more on Distance here:
https://brainly.com/question/23183268
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