Plotting theta' vs. theta for bifurcation [closed]

I have no idea how to plot u=2cos(theta) while simultaneously plotting theta' vs theta. help....

closed as off-topic by m_goldberg, Henrik Schumacher, Karsten 7., Carl Lange, bbgodfreyFeb 10 at 15:47

This question appears to be off-topic. The users who voted to close gave this specific reason:

• "This question cannot be answered without additional information. Questions on problems in code must describe the specific problem and include valid code to reproduce it. Any data used for programming examples should be embedded in the question or code to generate the (fake) data must be included." – m_goldberg, Henrik Schumacher, Karsten 7., Carl Lange, bbgodfrey
If this question can be reworded to fit the rules in the help center, please edit the question.

• Can you share some more details? What is theta'? – zhk Feb 10 at 5:49