Trigonometry
x=5sec(t),y=39tan(t)x=5\sec(t),y=\sqrt{39}\tan(t)x=5sec(t),y=39tan(t)
x=39sec(t),y=5tan(t)x=\sqrt{39}\sec(t),y=5\tan(t)x=39sec(t),y=5tan(t)
x=8sec(t),y=5tan(t)x = 8\sec(t), y = 5\tan(t)x=8sec(t),y=5tan(t)
x=5tan(t),y=39sec(t)x=5\tan(t),y=\sqrt{39}\sec(t)x=5tan(t),y=39sec(t)