Saturday
April 18, 2015

Homework Help: calculus

Posted by Kelly on Saturday, June 28, 2008 at 9:49pm.

conic sections

prove that the line x-2y+10=0 touches the ellipse 9x^2+64y^2=576

show that the equation of the normal to the ellipse x^2/a^2 + y^2/b^2 = 1 at the point (a cos theta, b sin theta ) is ax sin theta - by cos theta - (a^2-b^2) sin theta cos theta =0

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