Question

In a triangle with right angle at B, If b = 4 and angle C = 38 degrees, find a.
A) 2.6
B) 2.9
C) 3.2
D) 3.5
E) 3.8

Answer 1

\[cos(38)=\frac{a}{4}\]
\[a=4cos(38)\]
i get 3.152