sin^2π/3+cos^43π/2+tan^2π/3=
化简:[sin(π+α)*cos(π-α)*tan(π-α)]/[cos(π/2+α)*tan(3π/2-α)*tan(
已知tan(α+π/4)=2,则(2sinα+cosα)/(3cosα-2sinα)
已知tan(α+π/4)=2,求2cosα-sinα/cosα+3sinα
已知tanθ=3,求(3cosθ-5sin^2θcosθ)/sin(π-θ)的值
已知tan(α+π/4)=3,求cosα+2sinα/cosα-sinα的值
已知tan(3π+α)=2,求:1、(sinα+cosα)²;2、sinα-cosα/2sinα+cosα
已知tan(π-α)=2,求sinα-2sinαcosα-cosα/4cosα-3sinα的值
tan(a-4π)cos(π+a)sin^2(a+3π)/tan(3π+a)cos^2(2/5π+2)=0.5,求tan
已知tanα=2,sinα+cosα<0,求[sin(2π-α)*sin(π+α)*cos(-π+α)]/[sin(3π
(1+tanα)/(1-tanα)=3+2√2,求cos^2(π-α)+sin(π+α)*cos(π-α)+2sin(α
已知1+tanα/1-tanα=3+2根号2,求1.sinα 2.cosα 3.cos^2(π-α)+sin(π+α)*
已知【2+tan(θ-π)】/【1-tan(2π-θ】=-4,求(sinθ-3cosθ)(cosθ-sinθ)的值