The arctangent is the inverse tangent function. Since. tan Ï/4 = tan 45Âº = 1. The arctangent of 1 is equal to the inverse tangent function of 1, which is equal to Ï/4 radians or 45 degrees: arctan 1 = tan-1 1 = Ï/4 rad = 45Âº. 1  Arctan.  Arctan calculator.
1 The difference is that an artery brings blood to the body and a vein takes blood to the lungs.  Arteries and Veins are part of the circulatory system, where arteries carry the blood from the heart to the organs, and the veins carry it from the organs to the heart again.
The are both blood vessels, but have different functions. Arteries carry blood away from the heart and the veins bring blood to the heart. Arteries carry blood with more press â¦ ure than veins, so they are thicker and more muscular.Veins have something arteries do not have and that is valves.ell, for one thing, veins and arteries both carry blood through the body and they both lead from the heart too. The only difference is that the arteries, are fatter than veins. Also, i think that if you pop an artery or poke a hole in your artery, then your blood comes spewing out like a fountain!