[pstricks] inverse functions
E. Krishnan
ekmath at md5.vsnl.net.in
Tue Sep 30 14:55:34 CEST 2003
On Mon, 29 Sep 2003, Bhaskaracharya Pratishthana wrote:
> Presently I tried \parametricplot{0}{180}{t cos t}
> with pst-plot.sty
"\parametricplot" is a command available in the package "pst-plot". SO,
the package you loaded is just what you need. You may have come across
problems, since by default, the x and y coordinates are measured in the
same unit (1cm) in pstricks. SO, to "see" the graph either scale down the
y-coordinate (which measures the angle here) by 0.0174 (=pi/180) as in
\psset{yunit=0.0174cm}
\parametricplot{-90}{90}{t sin t}
or plot angles in radians my multiplying the angle in the range by 0.0174
and that in the function argument by 57.2958 (=180/pi)
\parametricplot{-1.5708}{1.5708}{57.2958 t mul sin t}
both give the same result. All these are explaines in Chapter 7 of the
PSTricks Tutorial at sarovar.org.
By the way, the domain of arcsin is (-\pi/2,pi/2) and *not* (0,\pi) as
you'd given.
--
Krishnan
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