1.已知sin(π/4-α)=3/5,π/4-α为第二象限角,求sin(α-13π/4)+sin(α+21π/4)的值2.已知y=a-bcos(3x-π/2的最大值为6,最小值为-2,求实数a,b的值
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/27 06:36:20
xՒJ@_%DŽdC6/"-$`/z TK
^4
;HS^g1EBHf~Lfm1j.ioE[0lˇY:/gGx5:ђRʥ* BzmesH6pDb_רtDAr6q5;ޮ2_lW_Z.ɂ_ʲt~Ǹ;485Qh22U!a ,Q⇉iEhS?eQABTI@̋@" ӑ7>Er
P*%늟N,%Yc|uWp!.FCA-9Gl-^Wuz
已知sin(α+π/3)+sinα=-4√3/5(-π/2
已知sin(α+π/4)=3/5,π/2
已知sin(3π-α)=-2sin(π/2+α)则sinαcosα
已知sin(x+π/6)=1/4,求sin(5π/6-x)+sin^2(π/3-x)
已知sinα=4/5,求下列三角函数值1)sin(-α)2)sin(π-α)3)sin(π+α)4)sin(2π-α)
已知sin(π-α)+sin(5π/2+α)=根号2/3(π/2
已知sin(3π+α)=2cos(α-4π)求cos(π/2 -α)+5sin(π/2 +α)/2cos(π+α)-sin(-α)
已知sin(α-β)=3/5,sin(α+β)=-3/5,π/2
已知sinα=﹣4/5,求√2 sin(α+π/4)的值
已知sin(α-π/4)=5/13 阿尔法∈(3π/4,π/4).求sinα的值
已知cos(α-π/6)+sinα=(4倍根号3)/5,则sin(α+7π/6)=
已知sin(α+π/3)+sinα = — 4根号3/5,— π/2第三题
已知sinα(x+π/6)=1/4,则sin(5π/6-x)+sin(π/3-x)的平方=?
已知sin(α-β)cosα-cos(β-α)sinα=3/5,β是第三象限角,求sin(β+5π/4)的值
已知sinα=-3/5,α是第四象限角,则sin(π/4-α)=
已知sinα=-3/5,α是第四象限角,则sin(α-π/4)=
已知sin(α-β)cosα-cos(α-β)sinα=3/5,β是第三象限角,求sin(β+π/4)的值
sin(-19π/6)=?已知[3Sin(π+a)+Cos(π-a)]/4Sin(-a)-Sin(5π/2+a)=2,求tan a