Categories Mathematics 1+cos3α = Post author By esimpk Post date June 16, 2021 No Comments on 1+cos3α = 2cos²(3α/2) sin²(3α/2) 3/2 cos²(3α/2) 2sin²2α ← 1+cos2α = → 1+cos4α = Leave a Reply Cancel replyYour email address will not be published. Required fields are marked *Comment * Name * Email * Website Save my name, email, and website in this browser for the next time I comment.