cos(30°+α)cosα+sin(30°+α)的值与α无关
问题描述:
cos(30°+α)cosα+sin(30°+α)的值与α无关
答
不对,应该cos(30°+α)cosα+sin(30°+α)sinα=cos30度
cos(30°+α)cosα+sin(30°+α)的值与α无关
不对,应该cos(30°+α)cosα+sin(30°+α)sinα=cos30度