यदि रेखा ax + by + c = 0 तथा 5x + 6y + 19 = 0 परस्पर लम्ब हो तो रेखा ax + by + c = 0 की प्रवणता ज्ञात कीजिये? - - Yadi Rekha ax + by + C = 0 Tatha 5x + 6y + 19 = 0 Paraspar Lamb Ho To Rekha ax + by + C = 0 Ki Pravannta Gyat kijiye ? Maths in hindi, co-ordinate geometry 6/5 question answers in hindi pdf 4/5 questions in hindi, Know About 5/6 Maths online test Maths notes in hindi quiz book 5/4