化简sin(π+α)/cos(-α)tan(2π-α)等于什么?
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化简sin(π+α)/cos(-α)tan(2π-α)等于什么?
化简sin(π+α)/cos(-α)tan(2π-α)等于什么?
化简sin(π+α)/cos(-α)tan(2π-α)等于什么?
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若sinα-cosα=-1/5,α∈(3/2π,7/4π),求sinα与cosα 若sin(α+β)=1/2,sin(α-β)=1/3,求log√5(ta若sinα-cosα=-1/5,α∈(3/2π,7/4π),求sinα与cosα 若sin(α+β)=1/2,sin(α-β)=1/3,求log√5(tan*cotβ)若sinα-2cosα/3sinα+5
(sinα+cosα)^2化简
化简(1-sinα+cosα/1-sinα-cosα )+(1-sinα-cosα/1-sinα+cosα)
化简[sin(π/2-α)cos(π/2-α)]/cos(π+α)-[sin(π-α)cos(π/2-α)]/sin(π+α)
sin(α+β)-2sinαcosβ/2sinαsinβ+cos(α+β)化简
化简sin(α+β)-2sinαcosβ 除以 2sinαsinβ+cos(α+β)
化简:2sin(π+α)cos(π-α)
化简:[ cos(α-π/2)/sin(5π/2+α) ] ×sin(α-2π) × cos(2π-α)RT.
化简[sin(2π-α)cos(π+α)cos(π/2+α)cos(11π/2-α)]/[cos(π-α)sin(π+α)sin(-π-α)sin[(...化简[sin(2π-α)cos(π+α)cos(π/2+α)cos(11π/2-α)]/[cos(π-α)sin(π+α)sin(-π-α)sin[(9π/2)+α]]
化简(sinα+cosα)²+(sinα-cosα)²
化简:(sinα+cosα)平方-(sinα-cosα)平方
化简(2sinα+cosα)²+(2cosα-sinα)²
cos(α-55)cos(α+5)+sin(α-55)sin(α+5)化简
α∈(0,π/2 ),比较 sin(cosα) 与cos(sinα)大小
化简:sin(α+β)cos(γ-β)-cos(β+α)sin(β-γ)
求值:(tan10°-√3)×cos10°/sin50° 求证:[sin(2α+β)]/sinα- 2cos(α+β)=sinβ/cosα 化简cosθ+cos(θ+2π/3)+cos(θ+4π/3) 证明:sin(α+β)sin(α-β)=sin^2α-sin^2β
化简:2sinα^2cosα-sin(3/2π-α)cos2α=
sinα+sinβ=sinγ cosα+cosβ=cosγ 证明cos(α-γ)