设α是锐角,cos(α+π/6)=-1/3,则cosα=____,sin(α+5π/12)=____

设α为锐角 若cos (α+π/3)=1/5则cos(α-π/6)= 设α是锐角,cos(α+π/6)=-1/3,则cosα=____,sin(α+5π/12)=____ 若α是锐角,且sin(α-π/6)=1/3,则COSα= sin(α-Π/6)=1/3,α是锐角,求cosα 设α是锐角,且cosα=5/13,求sinα的值 设α为锐角,若cos(α+π/6)=3/5,则sin(α-π/12)= 设α为锐角,若cos(α+π/6)=4/5,求sin（2α+π/12）, 若α是锐角,且sin(α-π/6)=1/3,则cosα的值是_________. 设f(α)=[2sin(π+α)cos(π-α)-cos(π+α)]/[(1+sin^2α+sin(π-α)-cos^2(π-α)1.若α=-17/6π,求f(α)的值2.若α是锐角,则sin(α-3/2π)=3/5,求f(α)的值 若α是锐角,且满足sin（α-π/6）=1/3,求cosα的值 设函数f(x)＝sin2x-cos(2x-π/6) 1.求[0,π/2]区间最大最小值 2.设α是设函数f(x)＝sin2x-cos(2x-π/6)1.求[0,π/2]区间最大最小值2.设α是锐角,f(α/2+π/4)=3/5求sinα 设α,β均为锐角,cosα=1/7,cos(α+β)=-8/17,则cosβ=? 设α、β均为锐角,cosα=7分之1,cos(α+β)=-4分之5,求cosβ的值如题. 设角α是锐角,且tanα=1/2,则sinα+cosα=_ (学霸快来帮我(┬＿┬))设角α是锐角,且tanα=1/2,则sinα+cosα=已知γ为锐角,且tan^2γ+根号2tanγ-4=0,求（3sin^2γ-2cos^2γ）/（3sin^2γ+2cos^2γ）的值. （我只算出了tan 已知α为锐角,且cos(α+π/6)=5/13,则cosα= 已知α为锐角,且cos(α+π/6)=4/5,则cosα 设α为锐角,求证：sinα+cosα 若角α为锐角,且sin(a-π/6)=1/3,则cosα=?