Answer
$\sin(-x)=-\sin(x)$
Work Step by Step
1. Set up calculator in degrees
$\sin 10^{\circ}\approx0.1736$
$\sin (-10)^{\circ}\approx0.1736$
2. Pick up more examples
$\sin30^{\circ}=0.5$
$sin (-30)^{\circ}=-0.5$
$\sin90^{\circ}=1$
$sin (-90)^{\circ}=-1$
