SinePC:

--------------------------------------------------------------------------
   Sine Pitch Control Algorithm

   This control algorithm implements an sinusoidal control pitch angle
   increment as a function of the rotor angle. The magnitude and phase of
   the sine law, as well as a constant pitch offset can be set in the
   file.

--------------------------------------------------------------------------
   Form:
   PitchInc = SinePC(theta,alpha1,offset)
--------------------------------------------------------------------------
   ------
   Inputs
   ------
   
   theta            (1,1)     Rotor angle (rad)
   alpha1           (1,1)     Zero-pitch angle of attack (rad) [NOT USED]
   offset           (1,1)     Desired offset angle

   -------
   Outputs
   -------
   PitchInc        (1,1)      Pitch angle control increment (rad)

--------------------------------------------------------------------------