1.

Let S be the circle in xy-plane which touches the x-axis at point A, the y-axis at point B and the unit circle x2+y2=1 at point C externally. If O denotes the origin, then the angle OCA equals

Answer»

Let S be the circle in xy-plane which touches the x-axis at point A, the y-axis at point B and the unit circle x2+y2=1 at point C externally. If O denotes the origin, then the angle OCA equals



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