It seems that light can be represented as a helical wave produced/traced by a particle.
Equation of a helix in parametric form is:
x = a sin(t) ;
y = a cos(t) ;
z = b t ;
When you plot this graph, you can see that the view from yz-plane shows it as a cosine curve, while the view from xz-plane shows it as a sine curve. This explains the fact that light can be represented as a sine as well as a cosine curve at the same instant. Also, this explains the wave-particle duality.
p.s. : Its like telling light consist of particles, but who knows!