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In-s [12.5K]
3 years ago
10

The Greek method for finding the equation of the tangent line to a circle uses the fact that at any point on the circle the line

s containing the center and the tangent line are perpendicular. Use this method to find an equation of the tangent line to the circle x squared plus y squared equals 49 at the point (1 comma 4 StartRoot 3 EndRoot ).
Mathematics
1 answer:
Alina [70]3 years ago
3 0

Answer:

Step-by-step explanation:

Given circle has equation as

x^2+y^2 =49

Center = P(0,0)

The point of contact of tangent = (1,4\sqrt{3} )Q

Since tangent is perpendicular to the radius at the point of contact, we have

Slope = \frac{4\sqrt{3} }{1} as slope of perpendicular to tangent

So tangent slope would be

-1/slope of this line

= \frac{-1}{4\sqrt{3} }

We have point on this line as given point

So using point slope form equation of tangent is

y-4\sqrt{3} =\frac{-1}{4\sqrt{3} } (x-1)\\4\sqrt{3} y -48 =-x+1\\x+4\sqrt{3} y= 49

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A) Demand function

price (x)          demand (D(x))

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When you calculate the vertex you find x = 5 /2

=> P(x) = 3345

Answer: you should charge a log-on fee of $2.5 to have the largest profit, which is $3345.




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