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Parametric Representation: Ellipse

Let A 0, - ...

Question

Let $A (0, - 1, 1), B (0, 0, 1), C (1, 0, 1)$ are the vertices of a triangle ABC. If R and r denotes the circumradius and intraradius of triangle ABC, then $\frac{r}{R}$ has value equal to

tan \frac{3 π}{8}

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cot \frac{3 π}{8}

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tan \frac{π}{12}

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cot \frac{π}{12}

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Solution

The correct option is B $cot \frac{3 π}{8}$

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