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Angle between two straight line is considered one of the most asked concept.
54 Questions around this concept.
The angle between the lines represented by is:
The portion of the line $4 x+5 y=20$ in the first quadrant is trisected by the lines $L_1$ and $L_2$ passing through the origin. The tangent of an angle between the lines $\mathrm{L}_1$ and $\mathrm{L}_2$ is :
Angle between two straight line
Two lines are given with the slope m1 and m2, then acute angle θ between the lines is given by
.
Note:
1. If the angle between the two lines is 0o or then lines are parallel two each other. In this case, m1 = m2 where m1 and m2 are slopes of two lines.
2. If the angle between the two lines is or then lines are perpendicular two each other. Then in this case m1⋅m2 = -1 where, m1 and m2 are slopes of two lines.
3. Equation of two straight line given as and . If these two lines are coincident then,
Illustriation
Find the angle between the line joining the points (0, 0), (2, 6) with line joining the points (2, 3), (3, 4)
Let A = (0, 0), B = (2, 6), C = (2, 3) and D = (3, 4)
Let m1 is the slope of AB and m2 is slope of CD
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Mathematics for Joint Entrance Examination JEE (Advanced) : Coordinate Geometry
Page No. : 1.17
Line : 10
July 04, 2019
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