y=var('y')
P1=plot_slope_field(sin(y)*x^2,(x,-10,10),(y,-10,10), headlength=4, headaxislength=2)
P2=implicit_plot(-1/2*log(cos(y) + 1) + 1/2*log(cos(y) - 1) == 1/3*x^3,(x,-10,10),(y,-10,10))
P=P1+P2
show(P)
P2 is not drawn T.T why???
It seems that P2 is not defined because log(cos(y) - 1) is not defined (logarithm of a nonpositive number).
Asked: 2016-05-10 15:36:47 +0200
Seen: 135 times
Last updated: May 10 '16
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