Question 1080835
{{{sin(30)/30.6=sin(C)/61.2}}}


{{{sin(C)=(61.2*sin(30))/30.6}}}

{{{sin(C)=(61.2/30.6)(1/2)}}}

{{{sin(C)=2/2}}}

{{{sin(C)=1}}}

{{{highlight(C=90*degrees)}}}
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Angle at A is 30 degrees, so for triangle, the other unknown angle at B must be 60 degrees.  {{{highlight(B=60*degrees)}}}.


You can use Pythagorean Theorem formula to find b.