∵sin(π+α)=-1/2 ∴sinα= 1/2 sin(π/2+α)=cosα=√3/2 cos(α-3π/2)=-sinα=-1/2 tan(π/2-α)=√3 希望能对你有所帮助,
已知:sin(π+α)=-1/2 计算:sin(π/2+α) cos(α-3π/2) tan(π/2-α)
1个回答
相关问题
-
已知f(α)=sin(π-α)cos(2π-α)tan(-α+3π/2)tan(-α-π) /sin(-π-α).(1)
-
已知f(α)=sin(α−π2)cos(3π2−α)tan(2π−α)tan(−α−π)sin(π+α).
-
已知f(α)=sin2(π−α)•cos(2π−α)•tan(−π+α)sin(−π+α)•tan(−α+3π).
-
已知f(α)=sin2(π−α)•cos(2π−α)•tan(−π+α)sin(π+α)•tan(−α+3π),
-
急,已知f(α)=sin(π/2-α)cos(2π-α)tan(-α+3π)/tan(π+α)sin(π/2+α)
-
已知tanα=2,sinα+cosα<0,求[sin(2π-α)*sin(π+α)*cos(-π+α)]/[sin(3π
-
..sin^2(π+α)*cos(π+α)*cos(-α-2π)/tan(π+α)*sin^3(π/2+α)*sin(-
-
已知:f(α)=sin(π2−α)•cos(3π2−α)•tan(5π+α)tan(−α−π)•sin(α−3π)
-
已知tan(π+α)=3,则2cos(π-α)-3sin(π+α)/4sin(α+π/2)+sin(2π-α)=
-
已知f(α)=sin(π-α)cos(2π-α)tan(-α-π)tan(-π+α)sin(-α-π)