NCERT Exemplar Solutions
Class 11 - Mathematics - Chapter 10: STRAIGHT LINES
Fill in the Blanks

Question. 42

If \(a, b, c\) are in A.P., then the straight lines \(ax + by + c = 0\) will always pass through ____.

Answer:

(1, -2)

Question. 43

The line which cuts off equal intercept from the axes and passes through the point \((1, -2)\) is ____.

Answer:

x + y + 1 = 0

Question. 44

Equations of the lines through the point \((3, 2)\) and making an angle of \(45^\circ\) with the line \(x - 2y = 3\) are ____.

Answer:

3x - y - 7 = 0, x + 3y - 9 = 0

Question. 45

The points \((3, 4)\) and \((2, -6)\) are situated on the ____ of the line \(3x - 4y - 8 = 0\).

Answer:

opposite sides

Question. 46

A point moves so that square of its distance from the point \((3, -2)\) is numerically equal to its distance from the line \(5x - 12y = 3\). The equation of its locus is ____.

Answer:

13(x^2 + y^2) - 83x + 64y + 182 = 0

Question. 47

Locus of the mid-points of the portion of the line \(x \, \sin\theta + y \, \cos\theta = p\) intercepted between the axes is ____.

Answer:

4x^2 y^2 = p^2 (x^2 + y^2)

NCERT Exemplar Solutions Class 11 – Mathematics – Chapter 10: STRAIGHT LINES – Fill in the Blanks | Detailed Answers