Gps Coordinate 1 mile away - Haversine

Question

I've come across the need for doing GPS calculations. I've implemented the haversineformula for gps distances but I need the opposite, a point 1 mile away in any direction. The GPS coordinates are converted into radians ...

http://en.wikipedia.org/wiki/Haversine_formula

haversine^-1(h, r) = 2r * arcsin(sqrt(h))
haversine(θ) = sin²(θ/2)

d = haversine^-1(haversine(lat₂ - lat₁) + cos(lat₁) * cos(lat₂) * haversine(lon₂ - lon₁), 3956)

d = distance in miles between two gps points
lat₁ and lon₁ (known variables)
lat₂ and lon₂ represent the second gps coordinate (unknown variables)

So what I'm asking is for the function ... gps(d) = .... = { latitude, longitude } where d is a known variable and the first set of coordinates is a known variable.