## Trigonometry 7th Edition

$59^{\circ} 43'$
$180^{\circ}$ - ($120^{\circ} 17')$ $180^{\circ}$ can also be written as $179^{\circ} 60'$ ( converting 1 degree to 60 minutes) therefore the problem becomes- $179^{\circ} 60'$ - $120^{\circ}17'$ $179^{\circ} 60'$ - $120^{\circ} 17'$ ________ $59^{\circ} 43'$ Answer is $59^{\circ} 43'$