Question

Given the following triangle, if b = 9 and < B = 15°, find a.
0.27
2.41
33.59

Answer 1

From the right triangle given, to obtain the unknown value we use the Trigonometry:
s/t
tan B=b/a
where:
B=15°
b=9
thus the value of a will be:
tan 15=9/a
solving for a we get:
a=9/tan 15
a=33.588~33.59

Answer: 33.59