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.
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.6 people found this useful.he arteries carry de oxygenated blood out of the heart into the lungs and the veins bring oxygenated blood into the heart, ready for circulation of the body. The difference i â¦ s that arteries carry blood away from the heart and veins carry blood towards the heart. 13 people found this useful.