已知sin(π/4+α)=√3/2,则sin(3π/4-α)值为
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已知sin(π/4+α)=√3/2,则sin(3π/4-α)值为已知sin(π/4+α)=√3/2,则sin(3π/4-α)值为已知sin(π/4+α)=√3/2,则sin(3π/4-α)值为(π/4
已知sin(π/4+α)=√3/2,则sin(3π/4-α)值为
已知sin(π/4+α)=√3/2,则sin(3π/4-α)值为
已知sin(π/4+α)=√3/2,则sin(3π/4-α)值为
(π/4+α)+(3π/4-α)=π
则sin(3π/4-α)=sin(π/4+α)=√3/2
已知sin(3π-α)=-2sin(π/2+α)则sinαcosα
已知sin(α+π/3)+sinα=-4√3/5(-π/2
已知sin(π/4+α)=√3/2,则sin(3π/4-α)值为
已知sinα=﹣4/5,求√2 sin(α+π/4)的值
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已知3sin²α+2sin²β=2sinα,求cos²α+cos²β的取值范围已知3sin²α+2sin²β=2sinα则有2sin²β=2sinα-3sin²α即sin²β=sinα-1.5sin²α所以cos²β=1-sin²β=1-(sinα-1.5sin²α)=1-