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.
Making the world better, one answer at a time. Arteries are the blood vessels that take blood away from the heart. Blood in the arteries are brown as they go away from the heart and blood travelling to the heart in veins are coloured red as it has just been replenished when passing the lungs.aking the world better, one answer at a time. Arteries are the blood vessels that take blood away from the heart. Blood in the arteries are brown as they go away from the heart and blood travelling to the heart in veins are coloured red as it has just been replenished when passing the lungs.