- #1
Oerg
- 352
- 0
Homework Statement
Find the equations of the tangents of the equation [tex] x^2+(y-4)^2=4[/tex] that pass through the origin.
The Attempt at a Solution
Ok, I don't know if I am overcomplicating this (takes a deep breath):
The equation of tangent that pass through the origin has the form
[tex]y=mx[/tex]
And the derivative of the curve is given by
[tex] \frac{dx}{dy}=\frac{1}{2}(4-(y-4)^2)^\frac{-1}{2}(2y+8)[/tex]
[tex]\frac{dy}{dx}=\frac{2x}{2y+8}[/tex]
Then equate m=dy/dx and y=mx into the equation of the curve
Here is where it gets really confusing and where I start to doubt my workings.