化简3sin(2π/3)cos(2π/3)
来源:学生作业帮助网 编辑:作业帮 时间:2024/09/11 02:02:52
x){3̼{:7ә_ijI*'J~
&VakoQdGX.y1XF 1H0XKAقO
o
@P%ƚHF NJ
sin cos之间怎么转换?sin(π/3-2X)等于cos多少?
化简:sin(2π-α)cos(π+α)cos(11π/2-α)/cos(π-α)sin(3π-α)sin(-π-α)sin(9π/2+α)
化简sin(π+a)cos(π-a)tana/cos(π/2+a)sina 求值,若sinθ+2cosθ=0.求3sinθ-2cosθ/2cosθ-...化简sin(π+a)cos(π-a)tana/cos(π/2+a)sina求值,若sinθ+2cosθ=0.求3sinθ-2cosθ/2cosθ-sinθ的值要详细的过程在线
化简sin(2π+a)cos(π-a)cos(π/2-a)cos(7π/2-a)/cos(π-a)sin(3π-a)sin(-π+a)sin(5π/2+π)
化简sin(-π/2-α)sin(πα)cos(-α-π)/cos(π-α)sin(3π α)
化简 sin(2π-a)sin(π+a)cos-π-a) / sin(3π-a)cos(π-a)
(1+sinα+cosα)*[sin(α/2)-cos(α/2)]/√(2+2cosα)化简 (3/2*π
化简:[sin(2π-a)cos(π+a)cos(π/2+a)cos(11π/2-a)[sin(2π-a)cos(π+a)cos(π/2+a)cos(11π/2-a)]/[cos(π-a)sin(3π-a)sin(-π-a)sin(9π/2+a)]
设角a=-35π/6,则2sin(π+α)cos(π-α)-cos(π+α)/ 1+sin^2α+sin(π-α)-cos^2(π+α)sina=sin(-35π/6)=sin(-6π+π/6)=1/2 cosα=根号3/22sin(π+α)cos(π-α)-cos(π+α)/ [1+sin^2α+sin(π-α)-cos^2(π+α)]=2(-sinα)(-cosα)+cosα/[1+sin²
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=
化简2sin^2[(π/4)+x]+根号3(sin^x-cos^x)-1
化简:[sin( π -a) cos( π+a)cos(3/2 π+a )]/cos(3 π-a )sin(3 π+a )sin(5/2 π-a )
化简:sin(a-2π)cos(a+π)tan(a-99π)/cos(π-a)sin(3π-a)sin(-a-π)
化简sin(α-5π)/cos(3π-α)×cos(π/2-α)/sin(α-3π)×cos(8π-α)/sin(-α-4π)
化简sin(a-5π)cos(-π/2-a)cos(8π-a)/sin(a-3π/2)sin(-a-4π)
化简sin(a-5π)cos(-π/2-a)cos(8π-a)/sin(a-3π/2)sin(-a-4π)
已知6sin²α+sinαcosα-2cos²α=0,α∈(π/2,π),求值1).(sinα-3cosα)/(sinα-cosα);2).sinαcosα-sin²α;3).sin²α-3cosαsinα-2