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Find the maximum value of \(\cos \theta_1 \sin \theta_2 + \cos \theta_2 \sin \theta_3 + \cos \theta_3 \sin \theta_4 + \cos \theta_4 \sin \theta_5 + \cos \theta_5 \sin \theta_1,\)
over all real numbers \(\theta_1,\theta_2, \theta_3, \theta_4,\theta_5.\)

 
 Mar 25, 2020

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