https://hi.khanacademy.org/math/ncert-class-12/x7ce8ca9c5869750b:three-dimensional-geometry-ncert-new/x7ce8ca9c5869750b:untitled-1145/v/angle-between-two-lines-1 2025-06-25T04:37:22.958747522Z दो रेखाओं के मध्य कोण In this video, we learn how to find the angle between two lines in 3D. We first understand how to do this when the vector forms are given. We then look at how this works in the cartesian form. We then practice problems finding the angles between lines in both the forms. Ashish Gupta video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw दो रेखाओं के मध्य कोण In this video, we learn how to find the angle between two lines in 3D. We first understand how to do this when the vector forms are given. We then look at how this works in the cartesian form. We then practice problems finding the angles between lines in both the forms. https://cdn.kastatic.org/ka-youtube-converted/XesEFWAjkTE.mp4/XesEFWAjkTE.mp4 462 दो रेखाओं के मध्य कोण (Angle between Two Lines) https://hi.khanacademy.org/math/ncert-class-12/x7ce8ca9c5869750b:three-dimensional-geometry-ncert-new/x7ce8ca9c5869750b:untitled-1145/e/angle-between-two-lines 2025-06-25T04:37:22.958747522Z दो रेखाओं के मध्य कोण सदिशों के अदिश गुणनफल (dot product) का उपयोग करके दो रेखाओं के बीच का कोण ज्ञात करें। exercise https://hi.khanacademy.org/math/ncert-class-12/x7ce8ca9c5869750b:three-dimensional-geometry-ncert-new/x7ce8ca9c5869750b:untitled-1145/v/parallel-and-perpendicular-lines 2025-06-25T04:37:22.958747522Z समांतर और लम्बवत् रेखाएं (Parallel and perpendicular lines) In this video, we first derive the conditions for parallel and perpendicular lines. We then apply these conditons to prove that given lines are parallel/perpendicular. We first solve problems where the points from which the lines pass are given. We then solve problems where the equations of the lines are given. Ashish Gupta video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw समांतर और लम्बवत् रेखाएं (Parallel and perpendicular lines) In this video, we first derive the conditions for parallel and perpendicular lines. We then apply these conditons to prove that given lines are parallel/perpendicular. We first solve problems where the points from which the lines pass are given. We then solve problems where the equations of the lines are given. https://cdn.kastatic.org/ka-youtube-converted/yBHFuWgyTtg.mp4/yBHFuWgyTtg.mp4 699 दो रेखाओं के मध्य कोण (Angle between Two Lines)