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Co - ordinate Geometry Ellipse

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If the line x cos α + y sin α = p be normal to the ellipse x² / a² + y² / b² = 1, then

A. p² (a² cos² α + b² sin² α) = a² - b²

B. p² (a² cos² α + b² sin² α) = (a² - b²)²

C. p² (a² sec² α + b² cosec² α) = a² - b²

D. p² (a² sec² α + b² cosec² α) = (a² - b²)²

E. None of the above

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Correct choice: D

Explanation:

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Eamcet Mathematics Co - ordinate Geometry Ellipse

Eamcet Mathematics
Co - ordinate Geometry Ellipse