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.
arteries are the blood vessels carrying oxygenated blood and veins carry deoxygenated blood. arteries carry blood from heart to rest part of the body while veins bring blood from rest of the body to the heart.