Question 11 The slope of a line is double of the slope of another line. If tangent of the angle between them is 1/3, find the slopes of he lines.
Class X1 - Maths -Straight Lines Page 212
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Hiiiiii.....
tan (theta) = m2 - m1 / 1 - m1 × m2 .....
tan( theta) = 1/3 ......and ... m1 = 2 m2 ....
1/3 = m2 - 2 m2 / 1 - 2 (m2)^2 ....
1 - 2 (m2)^2 = -3 m2 .....
From above.....Slope will be 1 and 2 .....
tan (theta) = m2 - m1 / 1 - m1 × m2 .....
tan( theta) = 1/3 ......and ... m1 = 2 m2 ....
1/3 = m2 - 2 m2 / 1 - 2 (m2)^2 ....
1 - 2 (m2)^2 = -3 m2 .....
From above.....Slope will be 1 and 2 .....
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