Question 1076710
The best first step, if your diagram and variables labeling are done in the common way, should be:


{{{sin(25)/18=sin(B)/28}}}


Use the proper variables regarding case-level.  {{{system(B<>b,A<>a)}}}.
They each mean different things.


NOW, solve for <b>B</b>.
{{{sin(B)=28*sin(25)/18}}}


{{{sin(B)=(14/9)*(0.422618)}}}


{{{sin(B)=0.657406}}}


{{{ArcWhoseSine(0.657406)=highlight(B=41.1*degrees)}}}.