根号sin^α-sin^4α(π/2〈α〈π)化简
来源:学生作业帮 编辑:搜搜做题作业网作业帮 分类:数学作业 时间:2024/07/07 18:07:28
根号sin^α-sin^4α(π/2〈α〈π)化简
根号sin平方α-sin4次方α(π/2〈α〈π)化简··········
根号sin平方α-sin4次方α(π/2〈α〈π)化简··········
![根号sin^α-sin^4α(π/2〈α〈π)化简](/uploads/image/z/6512548-4-8.jpg?t=%E6%A0%B9%E5%8F%B7sin%5E%CE%B1-sin%5E4%CE%B1%EF%BC%88%CF%80%2F2%E3%80%88%CE%B1%E3%80%88%CF%80%EF%BC%89%E5%8C%96%E7%AE%80)
这个sin^2α-sin^4α?
sin^2α-sin^4α
=sin²α(1-sin²α)
=sin²αcos²α
=1/4(2sinαcosα)²
=1/4sin²2α
sin^2α-sin^4α
=sin²α(1-sin²α)
=sin²αcos²α
=1/4(2sinαcosα)²
=1/4sin²2α
根号sin^α-sin^4α(π/2〈α〈π)化简
若sinα·cosα〈0,化简根号(1-sinα/2)/(1+sinα/2)+根号(1+sinα/2)/(1-sinα/
cos2α/[sin(α-π/4)]=-根号2 /2,cosα+sinα=?
已知sin(π+α)=根号3/2,求sin(3/4π-α)
(cos2α)/sin(α-π/4)=-根号下2/2,则cosα+sinα的值
sin(3π-α)=根号
已知sin(π/4+α)+sin(π/4-α)=根号2/3,(1)求sinα(2)求sin(α-π/4)/1-sin2α
已知sin (α+派/3)+sinα=-4根号3/5,-派/2
化简2sin^2[(π/4)+x]+根号3(sin^x-cos^x)-1
cos2α/sin(α-π/4)=-根号2/2,则cosα+sinπα等于什么
sin(α-4分之π)分之cos2α=—2分之根号2 求cosα+sinα
若sin2α=sinα+cosα,则根号2*sin(α+π/4)等于多少