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Femme_physics
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Homework Statement
http://img64.imageshack.us/img64/7782/circleb.jpg
I'm supposed to find the slope equation of the tangent line to the circle at point A.
A = (2, 7)
The circle's formula is
(x+1)2+(y+3)2 = 25
The center point of the circle is therefor (-1, 3)
So the slope from the center point to A is
M = [tex]\frac{7-3}{2-(-1)}[/tex]
M = [tex]\frac{4}{3}[/tex]
That's true so far according to the answers.
So I want to plug [tex]\frac{4}{3}[/tex] for slope, just take the opposite sign of it, and from some reason in the solution they flipped 3 and 4 in the fraction for the slope of tangent line to the circle at point A! Here ->
http://img4.imageshack.us/img4/3995/answerofficial.jpg
That's wrong, am I right?
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