look like tangent kervs, but offset bi -90deg (pi/2)...tan(theta+90)
?? horizontal distans tween 2 vertikal lines=1 ?? that meen angel vary bi 180 deg (pi) as x vary bi 1
impli tan[(theta+90)*pi]
B...yu sed vertikal lines be distans=1=period av tan...same as angel vary bi pi
C...koef av x???...tan(angel*pi)
D faze shift=0.5 in distans or pi/2 in angel
E????
F ????? "korrekt" ???? yu want it RITE ??