Hey there! We receieved your request
Stay Tuned as we are going to contact you within 1 Hour
One of our academic counsellors will contact you within 1 working day.
Click to Chat
1800-5470-145
+91 7353221155
Use Coupon: CART20 and get 20% off on all online Study Material
Complete Your Registration (Step 2 of 2 )
Sit and relax as our customer representative will contact you within 1 business day
OTP to be sent to Change
what is the method to get equation of two tangent from a point outside the cicle to given circle???
Hi Amit,Consider y=mx+c be the line which is a tangent.For this to be a tangent to any circle,Make the sub, y=mx+c in the circle equation. You will get a quad in x, which should have only one solution.And hence the disciminant of that Quad = 0.So you will get a relation between c and m------ (1)Also the line should pass through a point (x1,y1). so y1 = mx1+c ---------(2) {Another relation between m and c)So from 1 and 2, solve for m and c.Solving between m and c, you should get a quad in m, and hence two values of m, and hence two tangents can be drawn from a point.And hence you get the equations of the lines.Hope that helps.All the best,Regards,Ashwin (IIT Madras).
Get your questions answered by the expert for free
You will get reply from our expert in sometime.
We will notify you when Our expert answers your question. To View your Question
Win Gift vouchers upto Rs 500/-
Register Yourself for a FREE Demo Class by Top IITians & Medical Experts Today !