Equation of tangent to circle- HELP URGENTLY NEEDED
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0 Report postHow would you answer this question?A is the centre of circle C, with equation x^2- 8x y^2 10y 1=0P, Q and R are points on the circle and the lines L1, L2 and L3 are tangents to the circle at these points respectively. Line L2 intersects line L1 at B and line L3 at D.a) Find the centre and radius of C. (3 marks)b) Given that the x-coordinate of Q is 10 and that the gradient of AQ is positive,find the y-coordinate of Q, explaining your solution. (4 marks)c) Find the equation of l2, giving your answer in the form y = mx b. (4 marks)d) Given that APBQ is a square, find the equation of L1 in the form y = mx b. (4 marks)L1 intercepts the y-axis at E.e) Find the area of triangle EPA. (4 marks)
Original post by I-ZAAA
what would be the final answer then, i get 11.3 but i dont know how to get the other value
you should have a quadratic
Original post by Ramory
Isnt C for the discriminant should be 12? Because 16-4 is 12
could be, i didnt check if it was correct, I just rearranged it for him
So what actually is the answer? I've done all the steps but I don't even know at this point if it was right..
Original post by Ramory
Isnt C for the discriminant should be 12? Because 16-4 is 12
I had that it was 16 because it was 20-4 so I think it is right
Original post by Yoshi123
hero.
good lucks for next year, hopefully edexcel dont screw you like they screwed me
I got the answer as m = (9+ or -2√29)/10
(edited 1 year ago)
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