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Answer:
\text{S.A.S.}\rightarrow \text{Law of Cosines}
S.A.S.→Law of Cosines
a^2=b^2+c^2-2bc\cos A
a
2
=b
2
+c
2
−2bccosA
From reference sheet.
u^2 = 730^2+900^2-2(730)(900)\cos 76
u
2
=730
2
+900
2
−2(730)(900)cos76
Plug in values.
u^2 = 532900+810000-2(730)(900)(0.241922)
u
2
=532900+810000−2(730)(900)(0.241922)
Square and find cosine.
u^2 = 532900+810000-317885.37082
u
2
=532900+810000−317885.37082
Multiply.
u^2 = 1025014.62918
u
2
=1025014.62918
Add.
u=\sqrt{1025014.62918} \approx1012.43 \approx1012
u=
1025014.62918
≈1012.43≈1012
Step-by-step explanation: