化简：4sin π/4 cos π/4 求详解

化简sin(A+π/4)sin(A-π/4)/sin^4A-cos^4A 化简sin(π/4+α)cosα-sin(π/4-α)sinα 怎样化简函数 cosπ/4cosπ/3-sinπ/4sinπ/3cosπ/4cosπ/3-sinπ/4sinπ/3 化简sin(α-5π)/cos(3π-α)×cos(π/2-α)/sin(α-3π)×cos(8π-α)/sin(-α-4π) 化简sin(α-2π)+sin(-a-3π)cos(α-3π)/cos(π-α)-cos(-π-α)cos(α-4π) 化简：4sin π/4 cos π/4 求详解 化简cos(π/4-a) / sin(π/4+a) 化简sin(θ-π/4)+cos(θ+π/4) 化简sin(π/4-α)+cos(π/4+α) 化简sin(x-π/4)+cos(x+π/4) cos(x+π/4)+sin(x+π/4)化简 sin(θ-π/4)+cos(θ+π/4)化简, 化简：（cos(π/4+a)-sin(π/4+a)）/(cos(π/4-a)+sin(π/4-a)) 化简【cos(π/4+α)-sin(π/4+α)】/【cos(π/4-α)+sin(π/4-α)】.如题 化简:sin(π/4-α)cos(π/3-α)-cos(π/6+α)sin(π/4+α)= 化简：[1+2sin(α+2π)*cos(α-2π)]/[sin(α+4π)+cos(α+8π)] sin(4分之π-β)cosβ+cos(4分之π-β)sinβ= 利用和差角公式化简 (2)sin(π/3+α)+sin(π/3-α)(2)sin(π/3+α)+sin(π/3-α)(3)cos(π/4+α)-cos(π/4-α)(4)cos(60°+α)+cos(60°-α)(5)sin(α-β)cosβ+cos(α-β)sinβ(6)cos(α+β)cosβ+sin(α+β)sinβ