Wednesday

December 17, 2014

December 17, 2014

Posted by **Kelly** on Saturday, June 28, 2008 at 9:44pm.

Show that the circles x^2+y^2-6x+4y+2=0 and x^2+y^2+8x+2y-22=0 are orthogonal.

find the equation of the tangent to the ellipse x^2/a^2 + y^2/b^2 =1 at the point (a cos theta, b sin theta)

show that the equation of the tangent to the ellipse x^2/a^2 + y^2/b^2 =1 at the point (x1, y1) is xx1/a^2 + yy1/b^2 = 1.

**Answer this Question**

**Related Questions**

Geometry/Trigonometry - Circles with centers (2,1) and (8,9) have radii 1 and 9...

Geometry - Circles and tangents - Two circles of radius 1 are externally tangent...

math - Verify that the circles x2+y2 = 25 and (x−5)2+(y−10)2 = 50 ...

MATHS - two circles c1 and c2 meet at the points A and B. CD is a common tangent...

AP Calculus - Two circles of radius 4 are tangent to the graph of y^2=4x at the ...

Math - circles P and Q are externally tangent at T. Horizontal lines l and m are...

AP Calculus - I asked this yesterday and someone answered. but i didn't ...

PLEASE HELP TANGENTS AND CIRCLES PROBLEM GEOMETRY - PLEASE HELP I REALLY NEED ...

Algebra 2 - Make a table with a process column to represent each pattern. Write ...

Math (Circles) - True or False If two circles have 4 common tangents, then the ...