In this problem you will need to enter your answers as decimal approximations (with at least 4 digits). Usually WeBWorK will let you enter expressions like sin(...), but note that in that case WeBWorK always assumes your angles are measured in radians.
$\sin(15^\circ) =$
$\sin(15) =$
$\cos(1.4^\circ) =$
$\cos(1.4) =$