cos a sin 2 cos 1 2 2 Using the identity sin a cosa 1 make

Last updated: 11/28/2023

cos a sin 2 cos 1 2 2 Using the identity sin a cosa 1 make the appropriate substitution Which of the following substitutions proves the identity OA cos2 a 1 cos2 a 2 cos a 1 2 cos 1 2 cos a 1 OB cos2 1 sin a 2 cos a 1 2 cos a 1 2 cos 1 O C OD COS cos 2 a 1 sin a 2 cos 1 2 cos 1 2 cos a a 1 1 cos2 a 2 cos a 1 2 cos a 1 2 cos 1