Posted by yuia on Monday, February 25, 2013 at 11:43pm.
tangents are drawn from the point (4,0) to the circle x^2 +y^2 =1. find the slopes of the tangent.

precalculus  Steve, Tuesday, February 26, 2013 at 12:39am
If the tangent hits the circle at (h,k)
it has length
L^2 + 1 = 16
L = sqrt(15)
h^2 + k^2 = 1
(4+h)^2 + k^2 = 15
Solve for h,k, and the slope is
k/(4+h)
Answer This Question
Related Questions
 Geometry  Circles and tangents  Two circles of radius 1 are externally tangent...
 calculus  conic sections question 1: verify that the point (3,2) lies on the ...
 mathematics  The circle x22x+y24y4=0 lies on the cartesian plane,question 2....
 mathematics  The circle x22x+y24y4=0 lies on the cartesian plane,question 2....
 mathematics  The circle x22x+y24y4=0 lies on the cartesian plane,question 2....
 PreCalculus  Not sure what to solve... I tried to solve it but i ended up ...
 geometry  Two tangents drawn to a circle from an external point intercept a ...
 Math  Two lengths are drawn from a Point P to a circle centre (o). The radius ...
 Math (Pre Cal)  Hi, I am studying for a precalculus quiz and I do not ...
 math  From an external point E, tangents ES and ET are drawn to circle O. if m&...
More Related Questions