计算:cos94π+tan(−116π)
计算sin(-α-5π)*cos(α-2分之π)-tan(α-2分之3π)*tan(2π-α)
已知tanα=−13,计算:
tan=3,π
tanπ8
tan(a+π4
cosπ/3-tanπ/4+cosπ-sin3π/2 化简计算
计算sin(-π+π/3)+tan(3π/2-π/6)+sin15,
计算:sinπ/6+cosπ/6+tanπ/6+cotπ/6
计算:sin25π/6+cos25π/4+tan(-25π/4)+sin(-26π/3)
已知sin(π+α)=-1/2 计算 cos(2π-α) tan(α-7π)
计算sin3(-a)cos(2π+a)tan(-a-π)
计算sin4/3π.cos(-5/3π).tan(-45度)