var('t,u')
# This is an interactive and automatic version of the review problem #3
@interact
def _(time = slider(-2*pi,2*pi,pi/6,-pi/6),x = (cos(t)),y = (sin(t)),z = (t)):
xp = derivative(x,t)
yp = derivative(y,t)
zp = derivative(z,t)
xt = x(t=time)+xp(t=time)*t
yt = y(t=time)+yp(t=time)*t
zt = z(t=time)+zp(t=time)*t
pretty_print(html('$x = %s$'%str(latex(xt))))
pretty_print(html('$y = %s$'%str(latex(yt))))
pretty_print(html('$z = %s$'%str(latex(zt))))
G = parametric_plot3d([x,y,z],(t,-2*pi,2*pi),thickness = 5)
G += parametric_plot3d([xt,yt,zt],(t,-1,1),color='darkgreen',thickness = 4)
G.show()
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Click to the left again to hide and once more to show the dynamic interactive window
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