The graphs of trigonometric functions have several properties to elicit. To be able to graph these functions by hand, we have to understand them. Before we progress, take a look at this video that describes some of the basics of sine and cosine curves.
Quick Answer. Ng/ml stands for nanograms per milliliter. This unit of measurement is often used for lab test results. For example, results of lab tests taken to check the levels of progesterone in the human blood are measured in nanograms per milliliter. Continue Reading.
A nasogastric (NG) tube is  a flexible tube of rubber or plastic that is passed through the nose, down through the esophagus, and into the stomach. It can be used to either remove substances from, or add them to, the stomach. An NG tube is only meant to be used on a temporary basis and is not for long-term use. NG tubes after surgery for inflammatory bowel disease (IBD) used to be very common and was done as a matter of course. It's now thought that an NG tube is not always needed for every type of surgery or for every patient.