[sin(θ-π﹚/tan(3π-θ﹚]·[cot﹙π/2-θ﹚/tan﹙θ+﹙3π/2﹚﹚]·cos(π+θ﹚/sin
化简sin(θ-5π)•cot(π2-θ)•cos(8π-θ)tan(3π-θ)•tan(θ-32π)•sin(-θ-4
sin(θ -5π)/tan(3π-θ)*cot(π/2-θ)/tan(θ -3/2π)*cos(8π-θ)/sin(-
[cot(θ+4π)·cos(θ+π)·sin^2(θ+3π)]/[tan(π+θ)·cos^3(-π-θ)]
任意角三角函数 化简 tanα(cosα-sinα)+﹙sinα+tanα﹚/(cotα+cosα)
化简[cot(θ+4π)cos(θ+π)sin²(θ+3π)]/[tan(π+θ)cos²(-π-θ
化简:[sin(﹣α)cos(π-α)]∕[tan(π+α)sin﹙3π/2+α)]
已知tan﹙α+π/4﹚=2,(1)求(4sinα-2cosα)/(5sin²α+3cosα)的值;
已知tan(π/4-x)=﹣1/3,求[sin²﹙x+π/4﹚]/[2cos²x+sin2x]的值
已知tan﹙π-α﹚=2,求sin²α-2sinαcosα-cos²α分之4cos²α-3
化简:cos^2θcotθ+sin^2θtanθ+2cosθsinθ
已知tanθ=3,求(3cosθ-5sin^2θcosθ)/sin(π-θ)的值
已知tanθ+cotθ=2,求sin^3θ-cos^3θ的值