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Let C be the centre, BCB the minor axis and S the focus (ae, 0) for the ellipse `(x^2)/(a^2)+(y^2)/(b^2)=1. B ' S` is produced to meet the ellipse again in the point P. If CP makes an angle `varphi` with the positive direction of x-axis then `tanvarphi` is equal to `((a-e^2)^(3/2))/e` (b) `((1-e^2)^(3/2))/(2e)` `((1-e^2)^(1/2))/2` (d) `((1-e^2)^(-1/2))/e`

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