Thus, the xaxis is a horizontal asymptote The equation d d x e x = e x {\displaystyle {\tfrac {d}{dx}}e^{x}=e^{x}} means that the slope of the tangent to the graph at each point is equal to its y coordinate at that pointGiven an equation of the form f (x) = b x c d f (x) = b x c d for x, x, use a graphing calculator to approximate the solution Press Y= Enter the given exponential equation in the line headed "Y 1 =" Enter the given value for f (x) f (x) in the line headed "Y 2 =" Press WINDOW Adjust the yaxis so that it includes the value entered for "Y 2 ="The period is the distance (or time) that it takes for the sine or cosine curve to begin repeating again Graph Interactive Period of a Sine Curve Here's an applet that you can use to explore the concept of period and frequency of a
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