When you are given the point where two tangents to a curve intersect, how do you find the original points on the curve where the tangents touch the curve?
Graphs question watch
- Thread Starter
- 02-02-2010 19:30
- 02-02-2010 19:35
I'm guessing it may have something to do with if the two tangents bisect at right angles, you are aware of the gradient equality:
m (of one tangent) x m (of the other tangent) = -1
from then, you're on your own. hope it helps