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.
An artery is a hollow tube that carries blood from the heart to all the different regions of the body. What is the difference between an artery and a vein? The arteries take blood away from your heart to all the different organs in your body, including your brain, kidneys and liver.Arteries also take blood from the heart to all your limbs.he arteries take blood away from your heart to all the different organs in your body, including your brain, kidneys and liver. Arteries also take blood from the heart to all your limbs.