Question about Texas Instruments TI-89 Calculator

# I am trying to graph r=sqroot(sin2theta) on my ti-89 titanium in polar mode and it is telling me when i try to graph that there is an undefined variable. what do i do?

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Did you still need help with this? My suspicion is a missing multiplication sign. Sometimes you need to be very explicit in what you want the calculator to do. Have you tried sqroot(sin(2*theta)) explicitly putting the multiplication symbol in there? I think 2theta is interpreted as it's own variable name...

Posted on Jan 30, 2009

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Posted on Apr 22, 2017

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You found a neat way to do something? Then write a TIP, clearly labeled so that people in need of this information will be able to find it.
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