Using one of the questions I've done as an example.

Y=5sin4t - Find frequency, period, amplitude and phase angle.

My results

>0.64Hz

>1.5s

>5

>0°

What I don't quite understand is whether the phase angle is leading or lagging? (if my answer is correct)

A number of the questions I've done result with 0° phase angle. Advance apologies if this is a stupid question.

Thanks