- #1
david18
- 49
- 0
Circle C has equation [itex] x^2+y^2+6x-16=0 [/itex]
i) find centre and radius (turned out to be centre (-3,0) and radius 5)
ii)verify that point A, (0,4) lies on C
iii)Find the coords of point D, given that AD is a diameter of C
I can do parts i) and ii) and for part iii) would I just use a simultaneous equation with the equation of the line from centre to point A (which worked out as 4/3x+4) and the equation of the circle? Because it seems a bit long winded
i) find centre and radius (turned out to be centre (-3,0) and radius 5)
ii)verify that point A, (0,4) lies on C
iii)Find the coords of point D, given that AD is a diameter of C
I can do parts i) and ii) and for part iii) would I just use a simultaneous equation with the equation of the line from centre to point A (which worked out as 4/3x+4) and the equation of the circle? Because it seems a bit long winded