How can we find the angle at wich the curve of equation : r=b + acosθ hits the x-axis.(adsbygoogle = window.adsbygoogle || []).push({});

I want a fast way or method since I only need it to plot the graph well. I'm only asked to plot the curve well and pay attention to the angle at which the curve hits the x-axis and not to calculate and write how I got it.

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# I Angle at which cardioid hits the x-axis

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