Perpendicular lines have slopes that are negative reciprocals of each other: How to prove using trigonometry › Forums › Calculus › Perpendicular lines have slopes that are negative reciprocals of each other: How to prove using trigonometry This topic has 0 replies, 1 voice, and was last updated 8 months, 2 weeks ago by Rajeev Bagra. Viewing 1 post (of 1 total) Author Posts March 11, 2025 at 7:48 pm #4330 Rajeev BagraKeymaster Perpendicular lines have slopes that are negative reciprocals of each other: How to prove using trigonometry byu/DigitalSplendid inlearnmath Author Posts Viewing 1 post (of 1 total) You must be logged in to reply to this topic. Log In Username: Password: Keep me signed in Log In