sin(2π+α)tan(π+α)/sin(3π/2-α)tam(3π-α)tan(-π-α) 化简出的值是多少

若a属于(0,π/2)试比较tanα、tan(tanα)、tan(sinα) 已知α为锐角,且sin²α-sinαcosα-2cos²α=0 (1)求tanα的值 (2)求si已知α为锐角,且sin²α-sinαcosα-2cos²α=0(1)求tanα的值(2)求sin(α-π/3)的值求详解 1.求证tanαsinα/tanα-sinα=tanα+sinα/tanαsinα2.已知sinα+cosα=-1/5(π/2 化简cos2(-α)-tan(2π+α)/sin(-α) sin(2π-α)tan(α+3π)tan(-α-π)/tan(α-3π)cos(π-α) 化简cos(α -π )tan(α-2π)tan(2π-α)/sin(π+α) cos(π-α)tan(2π-α)tan(π-α)/sin(π+α) 化简 化简sin(2π-α）tan（α+π）tan（-α-π）/ 已知tanα-tanβ=2tanα^2tanβ,且αβ均不等于kπ/2.试求sinβsin(2α+β）/sinβ或者能给思路已知就是这个：tanα-tanβ=2tanαtanαtanβ 化简:cos(2π-α)sin(-π-α)/sin(π/2+α)tan(3π-α) 若α∈(0,π/6) 比较tan(sinα),tan(cosα),tan(tanα)的大小 tanα=2,求sin(π-α)cos(2π-α)sin(-α+ 3π/2)/tan(-α-π)sin(-π-α)的值 tan(π-α)*sin^2(α+π/2)*cos(2π-α)/cos^3(-α-π)*tan(2π-α) sin^2就是sin的平方,下同 若sin (π/4+α)sin(π/4-α)=-1/8,则2sin²α+tanα-1/tanα-1的值为 已知α∈(0,π|2）,2tanα+3sinβ=7,且tanα-6sinβ=1,求sinα的值 已知α,β∈(0,π/2),且2tanα+3sinβ=7,tanα-6sinβ=1,则sinα= sin(π/4+α)sin(π/4-α)=1/4 求2sin^2(a) -1+tana-1/tan sinα>tanα