When you graph, don't try to plot loads of points. Note that the cosine is at y = 1 when x = 0 and 2Ï; at y = 0 for x = Ï/2 and 3Ï/2, and at y = â1 for x = Ï. Plot these five interesting points, and then fill in the curve.
Transesophageal echocardiogram. A transesophageal echocardiogram, or TEE (TOE in the United Kingdom, reflecting the spelling transoesophageal), is an alternative way to perform an echocardiogram. A specialized probe containing an ultrasound transducer at its tip is passed into the patient's esophagus.
TEE also helps doctors assess a patient's status during surgery. For example, TEE can help check for blood flow and blood pressure problems. At the end of surgery, TEE might be used again to check how well the surgery worked. For example, TEE can show whether heart valves are working well. TEE also can show how well the heart is pumping.