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# Coordinate geometry HELP Watch

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1. my textbook has this question and I have no idea of what it is asking or what I have to do so pls help....
sketch the circle (x+2)^2+(y-3)^2=16 and find the equations of the four tangents to the circle which are parallel to the co-ordinate axis ???
2. (Original post by Wordnerd2)
my textbook has this question and I have no idea of what it is asking or what I have to do so pls help....
sketch the circle (x+2)^2+(y-3)^2=16 and find the equations of the four tangents to the circle which are parallel to the co-ordinate axis ???
Which part don't you understand? If it's the first part, look up the equation of a circle in your textbook. It's been given to you in a very standard format so you just need to look up how to interpret it. If it's the second part, you need to look at your graph and figure out where you can draw tangents that are parallel to the x and y axes.
3. (Original post by Wordnerd2)
my textbook has this question and I have no idea of what it is asking or what I have to do so pls help....
sketch the circle (x+2)^2+(y-3)^2=16 and find the equations of the four tangents to the circle which are parallel to the co-ordinate axis ???
Find equations of the green lines.

4. Work out the centre of the circle and the radius, and then work out the coordinates of the points where the tangent meets the circle? the lines looks like they're perpendicular to each other so find the gradient and then do -1/m? I hope this is helpful.

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5. (Original post by Habeebah)
the lines looks like they're perpendicular to each other so find the gradient and then do -1/m? I hope this is helpful.

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Nope. No need, and in addition, you will get division by 0 if you do that.
6. OHHH crap yeah cause the gradien's 0. I'm sure the answer is simple though

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7. (Original post by rdkgames)
find equations of the green lines.

thank youuuuu

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