The circles which can be drawn to pass through (3,0) and (5,0) and to touch the y-axis, intersect at an angle theta, then what is the value of cos(theta) ?

Question

dumbcow · Answer

if what is drawn above is true, then angle where they meet is 180
cos(180) = -1

?

anonymous · Answer

No that is not even in the option.
Option (a) 7/8
          (b) 1/2
         (c) 0
            (d) 1/sqrt(2)

anonymous · Answer

and I the question means that circles which pass through BOTH (3,0) and (5,0)

mertsj · Answer

Did you draw a picture?

anonymous · Answer

I tried...but can't understand how to take out that theta. 
And the diagram isn't given in the question...but I am pretty sure its talking about the circles passing through both the points.

anonymous · Answer

I guess so...since both are touching the y-axis and passing through those points...

anonymous · Answer

maybe going through both points and tangent to the y-axis?:
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anonymous · Answer

touching the y-axis.

anonymous · Answer

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