Editor
Editor
 Sep 18, 2022
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In triangle ABC, a=7, b=7 and c=9, then the value of angle $\beta$ is
Difficulty: Easy
A: 
$50^{\circ}$
B: 
$34^{\circ}15'$
C: 
$111^{\circ}30'$
D: 
$80^{\circ}$
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NETNUST Entry TestMathematicsFundamentals of Trignometry