An example

what is the geostrophic wind speed for a pressure gradient of 2 hpa/100km and density of 1.2 kg m-3 at a latitude of 20° ? (ω = 7.272 x 10-5 ,2 ω = 1.45x10-4) n p f 1 vg δ δ = ⋅ rho pgf = 2 h pa/100 km = 200 pa/100 km = 2 x 10-3 pa/m f = 2ωsinθ for 20˚ n, vg = 2 x 10-3/(1.2 x 2 x7.3x10-5 x 0.34) = 33.5 m/s

how do you find 0.34?