Sinc-squared function

From Calculus
Revision as of 12:24, 4 September 2011 by Vipul (talk | contribs) (Created page with "{{particular function}} {{angular function radian convention}} ==Definition== This function is defined as the composite of t...")
(diff) ← Older revision | Latest revision (diff) | Newer revision → (diff)
Jump to: navigation, search
This article is about a particular function from a subset of the real numbers to the real numbers. Information about the function, including its domain, range, and key data relating to graphing, differentiation, and integration, is presented in the article.
View a complete list of particular functions on this wiki
For functions involving angles (trigonometric functions, inverse trigonometric functions, etc.) we follow the convention that all angles are measured in radians. Thus, for instance, the angle of 90\,^\circ is measured as \pi/2.


This function is defined as the composite of the square function and the sinc function. Explicitly, it is given as:

x \mapsto (\operatorname{sinc} \ x)^2

Alternatively, it is given as:

Failed to parse (unknown function "\sinc"): \sinc^2 x := \left\lbrace \begin{array}{rl} 1, & x = 0 \\ \frac{\sin^2x}{x^2}, & x \ne 0 \\\end{array}\right.


Here is a graph on the interval [-3\pi,3\pi]:


The graph is a little unclear, here is an alternative version where different scalings are used for the x-axis and y-axis: