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If the straight line xcosalpha+ysinalpha...

If the straight line `xcosalpha+ysinalpha=p` touches the curve `(x^2)/(a^2)+(y^2)/(b^2)=1` , then prove that `a^2cos^2alpha-b^2sin^2alpha=p^2`.

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CENGAGE PUBLICATION-CONIC SECTIONS-All Questions
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  3. If the straight line xcosalpha+ysinalpha=p touches the curve (x^2)/(a^...

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  12. If the chords of contact of tangents from two poinst (x1, y1) and ...

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  16. Find the equation of an ellipse whose axes are the x-and y-axis and...

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