Find the exact value of cos (2a) Posted byadmin October 27, 2017 1 Comment on Find the exact value of cos (2a) 5.41K viewsOctober 30, 2017trigonometry 0 admin60 October 27, 2017 1 Comment Find the exact value of admin deleted answer October 30, 2017 Vidiane Costa commented October 27, 2017 cos or cot? 1 Answer ActiveVotedNewestOldest 0 admin60 Posted October 30, 2017 0 Comments Use the third formula for the double-angle Attachments 8A180B2C-7902-4536-AC71-1FE13ED23368.jpeg Register or Login

cos or cot?