Answer :

hoaiilinhh12

Answer:

m<U=60°

Step-by-step explanation:

[tex] \sin( sut) = \frac{st}{ut} \\ = \frac{7 \sqrt{114} }{14 \sqrt{38} } = \\ \frac{ \sqrt{3} }{2} \\ = > u = 60[/tex]

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