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Professor: Abdel Rahman bin Fateh / Level: First Baccalaureate / Mathematics Track: Experimental and Mathematical Sciences and Electrical and Mechanical Technology Sciences To download the lesson: http://bacfacile.com/files/download-f... Don't forget to follow us on our official page: / bacfacilecom For more: http://www.bacfacile.com ------------------------------------------------------- Orthogonal teacher Direct regular product formula Perpendicularity of two vectors Regular vector Distance between two points sin x - cos x Regular vector on a straight line Equation of a straight line defined by a point and a regular vector Perpendicularity of two straight lines Distance of a point from a straight line