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.
Veins are blood vessels carrying blood towards the heart, whereas arteries bring blood away from heart. Mostly, arteries contain oxygenated blood, and veins contain carbon dâ¦ioxide-rich and oxygen-poor blood; however, there is one exception.
Veins and arteries are both types of blood vessels but arteries carry blood away from the heart to the rest of the body while veins carry blood to the heart from the rest of the body.All arteries except the pulmonary and umbilical arteries carry oxygenated blood while all veins carry deoxygenated blood.eins and arteries are both types of blood vessels but arteries carry blood away from the heart to the rest of the body while veins carry blood to the heart from the rest of the body. All arteries except the pulmonary and umbilical arteries carry oxygenated blood while all veins carry deoxygenated blood.