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Editor
 Sep 18, 2022
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In triangle ABC, if $\beta=80^{\circ}$ a=9.3cm, c=101cm, then the angle $\alpha$ is
Difficulty: Easy
A: 
$17.68^{\circ}$
B: 
$47^{\circ}$
C: 
$27.7^{\circ}$
D: 
$19^{\circ}$
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NETNUST Entry TestMathematicsFundamentals of Trignometry