In triangle ABC, a=8, b=9,c=40 then the value of angle $\alpha$ is

E

Editor

Sep 18, 2022

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}

ID: 63273db9ca83163ac3a1093b