in co-ordinate geometry 2 circles,touching each other internally or externally have a common tangent.if the ecquations of those circles are given then we can easily find the ecq. of that tangent by substracting those circles ecq.s,but i think it has no valid resons.that is the method to find out the ecq. of a common chord.then if the commopn tangent is the common chord of the circles which are touching each other internally or externally??????
in co-ordinate geometry 2 circles,touching each other internally or externally have a common tangent.if the ecquations of those circles are given then we can easily find the ecq. of that tangent by substracting those circles ecq.s,but i think it has no valid resons.that is the method to find out the ecq. of a common chord.then if the commopn tangent is the common chord of the circles which are touching each other internally or externally??????
