An equation of the line tangent to the circle
X^2+y^2=34 at (-3,-5)

Question

An equation of the line tangent to the circle
X^2+y^2=34  at (-3,-5)

tkhunny · Answer

Have you considered calculating the Gradient at the point (-3,-5)?

anonymous · Answer

can you use calculus?  please say yes

anonymous · Answer

I just need a formula. 
Will point slope form work?

anonymous · Answer

no because you only have one point

tkhunny · Answer

If you can find the slope, the point will be sufficient.

anonymous · Answer

there is a real long annoying way to do this without calculus, but i forget it 
something abou the discriminat of some quadratic being zero
with calulus it is a snap

anonymous · Answer

Okay, I'll try it the calculus way

anonymous · Answer

take the derivative using implicit diff, solve for $y'$ then plug in the numebers

anonymous · Answer

I figured it out. Thank you.

anonymous · Answer

yw
want me to check or are you happy with your answer?