We can graph the set of parametric equations above by using a graphing calculator: First change the MODE from FUNCTION to PARAMETRIC, and enter the equations for X and Y in âY =â. For the WINDOW, you can put in the min and max values for \(t\), and also the min and max values for \(x\) and \(y\) if you want to.
Psoriasis. Psoriasis is a skin condition that creates red patches of skin with white, flaky scales. It most commonly occurs on the elbows, knees, trunk and scalp, but can appear anywhere on the body. It may occur for the first time in childhood but may not show up until much later in adulthood for others. It is a chronic condition that will often cycle through flare-ups and remissions throughout the rest of the patient's life. Psoriasis affects as many as 7.5 million people in the United States. We offer the latest and most advanced treatments for this condition. Many patients can achieve significant results with newer therapies. Read More Â» Rashes
They often are located on the outside of the elbows and knees, but psoriasis commonly affects the scalp and nails, too. Many things can trigger psoriasis, including stress, cold weather, skin damage, and certain medications. Unlike atopic dermatitis, psoriasis doesnât usually appear before age 10. Itâs more commonly found in adults. Psoriasis can mimic other skin diseases. Doctors diagnose it by closely examining your skin, nails, and scalp. Your doctor may also perform a skin biopsy. This involves removing a small skin sample and viewing it under a microscope.