Question

In triangle ABC, angle A= 74, a = 126, and b= 84. Find angle B

Answer 1

Angle B is 39.855°, hope this helps

Answer 2

Angle B = 39.85°

Explanation:

We have sine formula

`(a)/(sinA)=(b)/(sinB)=(c)/(sinC)`

Here A = 74°, a = 126 and b =84

Substituting

`(126)/(sin74)=(84)/(sinB)\\\\sinB=0.6408\\\\B=39.85^0`

Angle B = 39.85°