sin(a+π/3)+2sin(a-π/3)-根号3cos(2π/3-a)
来源:学生作业帮助网 编辑:作业帮 时间:2024/11/14 11:52:11
sin(a+π/3)+2sin(a-π/3)-根号3cos(2π/3-a)
sin(a+π/3)+2sin(a-π/3)-根号3cos(2π/3-a)
sin(a+π/3)+2sin(a-π/3)-根号3cos(2π/3-a)
sin(a+π/3)+2sin(a-π/3)-根号3cos(2π/3-a)
=sinacosπ/3+cosasinπ/3+2sinacosπ/3-2cosasinπ/3-√3cosacos2π/3-√3sinasin2π/3
=sina*1/2+cosa*√3/2+2sina*1/2-2cosa*√3/2-√3cosa*(-1/2)-√3sina*√3/2
=-√3cosa
化简求sin^2(a-π/3)+sin^2(a+π/3)+sin^2a
化简;sin^2 A+sin^2(A-π/3)+sin^2(A+π/3)
化简sin^2A+sin^(A-π/3)+sin(A+π/3)
化简:sin(-a)cos(2π+a)sin(-a-π)
化简sin(2π-a)sin(π+a)coa(-π-a)除以sin(3π-a)cos(π-a)
化简 sin(2π-a)sin(π+a)cos-π-a) / sin(3π-a)cos(π-a)
[sin(a-6π)cos(7π/2-a)]/[sin(3π+a)+sin(a-π)】=
[Sin(6π+a)Cos(7π-a)]/[Sin(3π+a)+Sin(-π+a)
sin(-2π-a)是等于sin(-a)?
sin(-19π/6)=?已知[3Sin(π+a)+Cos(π-a)]/4Sin(-a)-Sin(5π/2+a)=2,求tan a
化简sin(2π+a)
已知sin(3π+a)=2sin[(3π/2)+a],求sin^2a+sin2a的值
已知sin(3π+a)=2sin(3π/2+a),sin^2a+sin2a =
sin((3π)/3-a)=sin(π+(1/2-a))=-(sin(1/2-a))=-cosa
sin^2(a-π/6)+sin^2(a+π/6)-sin^2a
化简:sin方A+sin方(A-π/3)+sin方(A+π/3)
sin(3π/2+a)等于多少
sin(3π/2-a)等于几?