Présentation de cosinus2.jps

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[1 1 .5 .5 .1 .1] {orange} Quadrillage
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/f {
   Cos
} def

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#tex# $\pi $
pi 0 [1.5 dup] dctexlabel
#tex# $-\pi $
pi neg 0 [1.5 dup] dctexlabel
#tex# ${\pi \over 2}$
pi 2 div 0 [1.5 dup] dctexlabel
#tex# $-{\pi \over 2}$
pi -2 div 0 [1.5 dup] dctexlabel
#tex# ${3\pi \over 2}$
3 pi mul 2 div 0 (3 0) [1.5 dup] dctexlabel
#tex# $-{3\pi \over 2}$
-3 pi mul 2 div 0 [1.5 dup] dctexlabel

<tex>
$$
   y = \cos x
$$
</tex>

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/dy_boxit 3 def
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   {f} courbe
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[pi dup neg pi 2 div dup neg 3 pi mul 2 div dup neg] {ytick} apply

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