[tex]\tan 2\theta = \frac{{2r + k\cos \theta }}{{2h - k\sin \theta }}[/tex](adsbygoogle = window.adsbygoogle || []).push({});

How to (isolate) find [tex]\theta \; {?}[/tex]

([itex]h,k,r >0[/itex])

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# Quick trig

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