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Misc 6 - Find equation of line parallel to y-axis and drawn

Misc 6 - Chapter 10 Class 11 Straight Lines - Part 2
Misc 6 - Chapter 10 Class 11 Straight Lines - Part 3
Misc 6 - Chapter 10 Class 11 Straight Lines - Part 4
Misc 6 - Chapter 10 Class 11 Straight Lines - Part 5

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Misc 6 Find the equation of the line parallel to y-axis and drawn through the point of intersection of the lines x – 7y + 5 = 0 and 3x + y = 0. First we calculate point of intersection of lines x – 7y + 5 = 0 & 3x + y = 0 Solving (1) x – 7y + 5 = 0 x = 7y − 5 Putting value of x in (2) 3x + y = 0 3(7y − 5) + y = 0 21y − 15 + y = 0 21y + y − 15 = 0 22y − 15 = 0 22y = 15 y = 15/22 Putting value of y = 15/22 in (1) x – 7y + 5 = 0 x – 7(15/22) + 5 = 0 x = 7(15/22) − 5 x = (15 × 7 − 22 × 5)/22 x = (105 − 110)/22 x = ( −5)/22 Hence point of intersection is (( −5)/22, 15/22) The equation of line parallel to y-axis is of the form x = p where p is some constant Given that this equation of line passing through point of intersection (( − 5)/22, 15/22) Hence point (( − 5)/22, 15/22) will satisfy the equation of line Putting x = ( − 5)/22 in the equation x = p ( −5)/22 = p p = ( −5)/22 Thus, Required equation of line is x = p Putting values x = ( −𝟓)/𝟐𝟐

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Davneet Singh

Davneet Singh has done his B.Tech from Indian Institute of Technology, Kanpur. He has been teaching from the past 12 years. He provides courses for Maths, Science, Social Science, Physics, Chemistry, Computer Science at Teachoo.