Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
KCET2010MathematicsStraight Lines

Let P (-1,0), Q (0,0) and R=(3,3) be three points. The equation of the bisector of the angle PQR is

Options

  1. Ax- 3 y=0
  2. B3 x - y =0
  3. Cx + 3 y =0
  4. D3 x+y=0

Correct answer

D. 3 x+y=0

Step-by-step solution

array ll Given that, & P =(-1,0) and & Q =(0,0) & R =(3,3 3 ) array In AQR , aligned &= 3 3 3 &= 3 aligned aligned & & &= 60^ & &= 3 aligned Slope of line QR m ₁= 3 3 -0 3-0 = 3 m ₁= 3 Slope of line QP m ₂= 0-0 -1-0 =0 m ₂=0 Slope of line QP m ₂= 0-0 -1-0 =0 m ₂=0 Let the angle between PQR is , then aligned &= | m ₁- m ₂ 1+ m ₁ m ₂ | &= | 3 -0 1+0 |= 3 or - 3 & = 2 3 = 2 3 & [ ( 3 ) from figure ] aligned Hence, RQB = 2 = 2 6 = 3 So, the angle bisector making an angle with (+) ive x -axis, is 3 + 3 = 2 3 The equatio

Practice Straight Lines on Quantrex Academy →

More from Straight Lines

The locus of the third vertex of a right-angled triangle, the ends of whose hypotenuse are (1,2) and (4,5) , is 2025The coordinate axes are rotated about the origin in the counter clockwise direction through an angle 60^ . If a and b are the intercepts made on the new axes by a straight line who 2025The image of a point (2,-1) with respect to the line x-y+1=0 is 2025If a straight line is at a distance of 10 units from the origin and the perpendicular drawn from the origin to it makes an angle 4 with the negative X -axis in the negative directi 2025A straight line passing through the origin O meets the parallel lines 4 x+2 y=9 and 2 x + y +6=0 at the points P and Q respectively. Then the point O divides the line segment PQ in 2025A (4,3), B (2,5) are two points. If P is a variable point on the same side as that of the origin with respect to the line AB and is at most at a distance of 5 units from the midpoi 2025By shifting the origin to the point (2,3) through translation of axes, if the equation of the curve x^2+3 x y-2 y^2+4 x-y-20=0 is transformed to the form Ax ^2+ Bxy + Cy ^2+ Dx + E 2025The points (2,3) and (-4,- 4 3 ) lie on the opposite sides of the line L 5 x -6 y + k =0 and k is an integer. If the points (1,2) and (4,5) lie on the same side of the line L =0 , 2025 Full Straight Lines list All KCET PYQs