若tanα=m 则sin(-5π-α)cos(3x+α)=
若tanα=m 则sin(-5π-α)cos(3x+α)=
设tan(5π+α)=m,则sin(α−3π)+cos(π−α)sin(−α)−cos(π+α)
若tanα=a,则sin(-5π-α)×cos(3π+α)=?
x=cos(π+α)sin²(3π+α)/tanαtan(π+α)cos三次方(-π-α),则x²+
已知sinα=m-3/m+5,cosα=4-2m/m+5,若α∈(π/2,π),则tanα/2的值
若tan(5π+α)=m,求sin(-α)-cos(π-α)/sin(α-5π)+cos(π+α)的值
若tanα=2,则(5cosα-3sinα)/(3sinα+cosα)=
若tanα=2,则2sin^2α-3sinαcosα+5cos^2α=?
已知tanα=m求sinα cosα
设tan(5π+α)=m,求[sin(-α)-cos(π+α)]的值
已知tanα=1/3,计算(1)sinα+2cosα/5cosα-sinα,(2)1/2sinαcosα+cos^α
若tanα=2,则sinα-cosα/sinα+2cosα=