sin(2π-α)tan(α+π)cos(α-π)/cos(α+π)tan(3π-α)化简 快

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sin(2π-α)tan(α+π)cos(α-π)/cos(α+π)tan(3π-α)化简快sin(2π-α)tan(α+π)cos(α-π)/cos(α+π)tan(3π-α)化简快sin(2π-α

sin(2π-α)tan(α+π)cos(α-π)/cos(α+π)tan(3π-α)化简 快
sin(2π-α)tan(α+π)cos(α-π)/cos(α+π)tan(3π-α)
化简 快

sin(2π-α)tan(α+π)cos(α-π)/cos(α+π)tan(3π-α)化简 快
sin(2π-α)tan(α+π)cos(α-π)/cos(α+π)tan(3π-α)
=(-sinα)tanα(-cosα)/(-cosα)(-tanα)
=sinα

若α∈(-π/2+2kπ,2kπ)(k∈Z),则sinα,cosα,tanα的大小关系是A.tanα>sinα>cosαB.tanα>cosα>sinαC.tanα<sinα<cosαD.tanα<cosα<sinα 求证:(1-sinα+cosα)/(1+sinα+cosα)=tan(π/4-α/2) 求证:1-2sinαcosα/cos²α-sin²α=tan(π/4-α) 已知tan(3π+α)=2,求:1、(sinα+cosα)²;2、sinα-cosα/2sinα+cosα 已知tan(π-α)=2,求sin²α-2sinαcosα-cos²α/4cos²α-3sin²α+1 已知tan(π-α)=2,求sinα-2sinαcosα-cosα/4cosα-3sinα的值 化简:sin²(α+π)cos(-α+π)/tan(α+π)tan(α+2π)cos²(-α-π)1.cos(27°+α)cos(33°-α)-sin(27°+α)sin(33°-α) 2.sin²(α+π)cos(-α+π)/tan(α+π)tan(α+2π)cos²(-α-π) [sin(2π+α)·tan(-α)·cos(-α)]÷[sin(-α)·cos(2π+α)·tan(2π+α)化简 求证:[tan(2π-α)cos(3π/2-α)cos(6π-α)]/[sin(α+3π/2)cos(α+3π/2)]=-tanα 1)tan(x/2+π/4)+tan(x/2-π/4)=2tanx(2)(1-2sinαcosα/cos²α-sin²α)=(1-tanα)/(1+tanα) ①sin(α+180°)cos(-α)sin(-α-180°)和②sin³(-α)cos(2π+α)tan(-α-π)化简 已知 3sin(π+α)+cos(-α)/4sin(-α)-cos(9π+α)=2,则tan α=2- tan α=α,则sin(-5π-α)cos(3π+α)= sinα+cosα=-7/5,α∈(π,2π),求tanα sinα+cosα=tanα(α∈(0,π/2)),求α范围 化简sin(π+α)/cos(-α)tan(2π-α)等于什么? 化简下列各式 1)cos(α-π)/sin(π-α)tan(α-π) 2)sin(180º+α)cos(-α)tan(π-化简下列各式 1)cos(α-π)/sin(π-α)tan(α-π) 2)sin(180º+α)cos(-α)tan(π-α) 2sin²α-sinαcosα/sinαcosα+cos²α (tan=2) (2cos^2-1)/2tan(π/4-α)sin^2(π/4+α)