Find the unit vectors that are parallel to the tangent line to the curve ( y = 2 sin(x) ) at the point (( pi/6, 1 )).
a) ( √3/2, 1/2 )
b) ( 1/2, √3/2 )
c) ( √2/2, √2/2 )
d) ( -1/2, -√3/2 )