1-(根号2)SIN(2X-四分之派)——————————————COSX
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/04 03:26:42
![1-(根号2)SIN(2X-四分之派)——————————————COSX](/uploads/image/z/5630568-24-8.jpg?t=1-%EF%BC%88%E6%A0%B9%E5%8F%B72%EF%BC%89SIN%EF%BC%882X-%E5%9B%9B%E5%88%86%E4%B9%8B%E6%B4%BE%EF%BC%89%E2%80%94%E2%80%94%E2%80%94%E2%80%94%E2%80%94%E2%80%94%E2%80%94%E2%80%94%E2%80%94%E2%80%94%E2%80%94%E2%80%94%E2%80%94%E2%80%94COSX)
1-(根号2)SIN(2X-四分之派)——————————————COSX
1-(根号2)SIN(2X-四分之派)
——————————————
COSX
1-(根号2)SIN(2X-四分之派)——————————————COSX
先将分子展开,再利用公式化简即可
原式=1-sin2x+cos2x/cosx
= 2(cosx)^2-2sinxcosx/cosx
=2cosx-2sinx