sin3(-α)cos(2π+α)tan(-α-π)化简
化简(1)、sin(α+180度)cos(-α)sin(-α-180度)(2)、sin3(-α)cos(2π+α)tan
已知(sinα+sin2α+sin3α)/(cosα+cos2α+cos3α)=﹣4/tanα,且π<2α<3π/2,求
化简 (1)、sin(α+180度)cos(-α)sin(-α-180度) (2)、sin3(-α)cos(2π+α)t
cosπ/3-tanπ/4+cosπ-sin3π/2 化简计算
α为第三象限角 f(α)=Sin(π+αCos(2π-α)/tan(π-α)Sin3/2π-α) 1、化简f(α)2、若
cosπ/3+tanπ/4+3tan²π/6+sinπ/2+cosπ+sin3π/2等于?.
计算sin3(-a)cos(2π+a)tan(-a-π)
化简:[sin(π+α)*cos(π-α)*tan(π-α)]/[cos(π/2+α)*tan(3π/2-α)*tan(
化简 (1)、sin(α+180度)cos(-α)sin(-α-180度) (2)、sin3(-α)cos(2π+α)t
已知O<α<π,且sinα,cosα是方程5x2-x+m=0的两个根,求:tan(3π-α) sin3α+cos3α
化简{sin(π+α)^3cos(-α)cos(π+α)}/{tan(π+α)^3cos(-π-α)^2}
cosπ/3-sin平方π/4cosπ-1/3tan平方π/3-sin3π/2+cos0的值