Answer
$a= 1311.04\ m$, $b= 3330.68\ m$, $A= 21.4858^\circ$
Work Step by Step
Use the definitions of sine and cosine, we have $a=3579.42cos(68.5142^\circ)\approx 1311.04\ m$, $b=3579.42sin(68.5142^\circ)\approx 3330.68\ m$, and angle $A=90^\circ-68.5142^\circ=21.4858^\circ$
