Categories Mathematics 1+cos2α = Post author By esimpk Post date June 16, 2021 No Comments on 1+cos2α = 2sinα 2cosα 2secα 2cos²α ← 1+2+3+…+n = → 1+cos3α = Leave a Reply Cancel replyYour email address will not be published.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.