3. If a line has the direction ratios – 18, 12, – 4, then what are its direction cosines ? -12 3. If a line has the direction ratios – 18 4 then what are its direction cosines ? November 15, 2021 Category: Chapter 11 - 3D Geometry , Maths , NCERT Exemplar Class 12 , Facebook Messenger WhatsApp Share this:TwitterFacebook Related