2 Proof the following cos2x 1 a tanx sin2x 1 cos2x 1 cos2x

Last updated: 8/2/2023

2 Proof the following cos2x 1 a tanx sin2x 1 cos2x 1 cos2x tan x cos2x 1 sin2x cos2x 1 sin2x d 4 cos x cos2x 5 6sin x b