Escitalopram is an oral drug that is used for treating depression and generalized anxiety disorder. Chemically, escitalopram is similar to citalopram . Both are in a class of drugs called selective serotonin reuptake inhibitors (SSRIs), a class that also includes fluoxetine , paroxetine and sertraline .
1 A circle is all of the points that are a fixed distance, known as the radius, from a given point, known as the center of the circle. 2  Explore the standard equation of a circle using the applet below (Go here for a larger version).
1 Find an equation of the circle whose center is at the point (-4, 6) and passes through the point (1, 2). 2  Find an equation of the circle whose center is at the point (-3, 6) and is tangent to the y axis. 3  Find an equation of the circle whose center is at the point (2, -5) and is tangent to the x axis.