The question goes:
A circle, Centre of the origin, radius 5, has equation: x^2+y^2=25
Find the equation of the tangent to the circle that passes through the point(3,4)
How do I solve this?

Question

The question goes:
A circle, Centre of the origin, radius 5, has equation: x^2+y^2=25
Find the equation of the tangent to the circle that passes through the point(3,4)
How do I solve this?

mrnood · Answer

first of all

Can you see whether the point given is ON the circle?

If so can you work out the slope of the line from th ecentre to the point?....

anonymous · Answer

yeah the point given is on the circle, but from here Im not sure where to start or go.

mrnood · Answer

so what is the slope of the radius from the centre to that point?

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