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The coordinates of the foot of the perpe...

The coordinates of the foot of the perpendicular from (2,3) to the line `3x+4y - 6 = 0 ` are

A

`(-14/25,-27/25)`

B

`(14/15,-17/25)`

C

`(-14/25,17/25)`

D

`(14/25,27/25)`

Text Solution

AI Generated Solution

The correct Answer is:
To find the coordinates of the foot of the perpendicular from the point (2, 3) to the line given by the equation \(3x + 4y - 6 = 0\), we can use the formula for the foot of the perpendicular from a point to a line. ### Step-by-Step Solution: 1. **Identify the given point and line equation**: - The point is \(P(2, 3)\). - The line equation is \(3x + 4y - 6 = 0\). 2. **Rewrite the line equation in the form \(Ax + By + C = 0\)**: - Here, \(A = 3\), \(B = 4\), and \(C = -6\). 3. **Use the formula for the foot of the perpendicular**: The coordinates of the foot of the perpendicular from the point \((x_1, y_1)\) to the line \(Ax + By + C = 0\) are given by: \[ \left( x, y \right) = \left( \frac{B(Bx_1 - Ay_1) - AC}{A^2 + B^2}, \frac{A(Ay_1 - Bx_1) - BC}{A^2 + B^2} \right) \] 4. **Substitute the values into the formula**: - Here, \(x_1 = 2\), \(y_1 = 3\), \(A = 3\), \(B = 4\), and \(C = -6\). - Calculate \(A^2 + B^2\): \[ A^2 + B^2 = 3^2 + 4^2 = 9 + 16 = 25 \] 5. **Calculate the x-coordinate**: \[ x = \frac{4(4 \cdot 2 - 3 \cdot 3) - 3 \cdot (-6)}{25} \] \[ = \frac{4(8 - 9) + 18}{25} = \frac{4(-1) + 18}{25} = \frac{-4 + 18}{25} = \frac{14}{25} \] 6. **Calculate the y-coordinate**: \[ y = \frac{3(3 \cdot 3 - 4 \cdot 2) - 4 \cdot (-6)}{25} \] \[ = \frac{3(9 - 8) + 24}{25} = \frac{3(1) + 24}{25} = \frac{3 + 24}{25} = \frac{27}{25} \] 7. **Final coordinates of the foot of the perpendicular**: The coordinates of the foot of the perpendicular from the point (2, 3) to the line \(3x + 4y - 6 = 0\) are: \[ \left( \frac{14}{25}, \frac{27}{25} \right) \] ### Final Answer: The coordinates of the foot of the perpendicular are \(\left( \frac{14}{25}, \frac{27}{25} \right)\).
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Knowledge Check

  • The coordinates of the foot of the perpendicular from (a,0) on the line y = mx + a/m are

    A
    `(0,-1/a)`
    B
    `(0,a/m)`
    C
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    D
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    A
    (-58/25, 19/25)
    B
    (58/25,-19/25)
    C
    (25/58,-25/19)
    D
    none of these
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    A
    (2 , 9)
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    (5 , 6)
    C
    (-5 , 6)
    D
    (6,5)
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