2015数学常见知识大全推荐函数积化和差公式大全
http://www.newdu.com 2025/09/23 10:09:13 中考网 佚名 参加讨论
积化和差 sinαsinβ = [cos(α-β)-cos(α+β)] /2 cosαcosβ = [cos(α+β)+cos(α-β)]/2 sinαcosβ = [sin(α+β)+sin(α-β)]/2 cosαsinβ = [sin(α+β)-sin(α-β)]/2 (责任编辑：admin) |
积化和差 sinαsinβ = [cos(α-β)-cos(α+β)] /2 cosαcosβ = [cos(α+β)+cos(α-β)]/2 sinαcosβ = [sin(α+β)+sin(α-β)]/2 cosαsinβ = [sin(α+β)-sin(α-β)]/2 (责任编辑：admin) |