Editor
Editor
 Sep 18, 2022
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In triangle ABC, a=8, b=9,c=40 then the value of angle $\alpha$ is
Difficulty: Easy
A: 
$27.5^{\circ}$
B: 
$31.7^{\circ}$
C: 
$81.1^{\circ}$
D: 
$38.7^{\circ}$
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NETNUST Entry TestMathematicsFundamentals of Trignometry