This all I know.
True-Wind Calculator Formulas
** Apparent-Wind (AW) and Apparent-Wind Degrees off the bow (D) are known. }
Y = 90 - D
a = AW * ( cos Y )
bb = AW * ( sin Y )
b = bb - BS
True-Wind Speed = (( a * a ) + ( b * b )) 1/2
True-Wind Angle = 90-arctangent ( b / a )
Apparent-Wind Calculator Formulas
** True-Wind (TW) and Apparent-Wind Degrees off the bow (D) are known. }
Y = 90 - D
a = TW * ( cos Y )
b = TW * ( sin Y )
bb = b + BS
Apparent-Wind Speed = (( a * a ) + ( bb * bb )) 1/2
Apparent-Wind Angle = 90- arctangent ( bb / a )
True and Apparent Wind Calculator