This discussion is closed.
Fizzle
Badges: 0
#1
Report Thread starter 14 years ago
#1
the points A(-3,-2) and B(8,4) are at the ends of a diameter of a circle.
a)find the co-ordinates of the circle
b) find an equation of the diameter AB, giving your answer in the form ax+by+c=0
c) find an equation of tangent to the circle at B

---> main problem is part D
d) the line L passes through A and the origin. find the co-ords of the point at which L intersecs the tangent to the circle at B, giving your answer as exact fractions.

Thanks!!
0
Aitch
Badges: 2
Rep:
?
#2
Report 14 years ago
#2
(Original post by Fizzle)
the points A(-3,-2) and B(8,4) are at the ends of a diameter of a circle.
a)find the co-ordinates of the circle
b) find an equation of the diameter AB, giving your answer in the form ax+by+c=0
c) find an equation of tangent to the circle at B

---> main problem is part D
d) the line L passes through A and the origin. find the co-ords of the point at which L intersecs the tangent to the circle at B, giving your answer as exact fractions.

Thanks!!
Equation for L is 3y = 2x
find where this intersects with answer to (c)

Aitch
0
Aitch
Badges: 2
Rep:
?
#3
Report 14 years ago
#3
(Original post by Aitch)
Equation for L is 3y = 2x
find where this intersects with answer to (c)

Aitch
I get 6y = 112 - 11x as tangent...
call L 6y = 4x

so 112 - 11x = 4x etc

some messy fractions.

Aitch
0
X
new posts
Back
to top
Latest
My Feed

See more of what you like on
The Student Room

You can personalise what you see on TSR. Tell us a little about yourself to get started.

Personalise

University open days

  • University of East Anglia
    Undergraduate Open Day Undergraduate
    Sun, 20 Oct '19
  • University for the Creative Arts
    Undergraduate Open Day Undergraduate
    Sun, 20 Oct '19
  • University of Gloucestershire
    Undergraduate Open Day Undergraduate
    Sun, 20 Oct '19

Have you made up your mind on your five uni choices?

Yes I know where I'm applying (56)
66.67%
No I haven't decided yet (18)
21.43%
Yes but I might change my mind (10)
11.9%

Watched Threads

View All