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.
Best Answer: arteries take blood away from the heart (oxygenated), veins take blood back to the heart (deoxygenated). They are separate systems joined together by capillary networks whereby gas exchange occurs.Source(s): HwPal-http://www.hwpal.com/.rteries are like the water pipes in your house. the veins would be the sewer pipes. the capillaries are the sinks where the water comes from the water pipes and goes to the sewer.