若tan(5π+α)=m,求sin(-α)-cos(π-α)/sin(α-5π)+cos(π+α)的值
若tan(5π+α)=m,求sin(-α)-cos(π-α)/sin(α-5π)+cos(π+α)的值
已知tan(π-α)=2,求sinα-2sinαcosα-cosα/4cosα-3sinα的值
已知tan(α+π/4)=3,求cosα+2sinα/cosα-sinα的值
若tanα=m 则sin(-5π-α)cos(3x+α)=
若tanα=m,求sin(-6π-α)cos(4π+α)的值
已知π/2<α<π,若cosα-sinα=-根号5/5,求(sinα+cosα+2sinαcosα)/(1-tanα)的
已知tan(3π+α)=2,求:1、(sinα+cosα)²;2、sinα-cosα/2sinα+cosα
已知tanα=1/5,求(sinα+cosα)/(sinα-cosα)的值
设tan(5π+α)=m,则sin(α−3π)+cos(π−α)sin(−α)−cos(π+α)
设tan(5π+α)=m,求[sin(-α)-cos(π+α)]的值
若tanα=根号下2 求1)(sinα+cosα)/(cosα-sinα) 2)2sin^α-sinαcosα+cos^
已知tan(α+π)=3,求【2cos(π-α)-3sin(π+α)】/[4cos(-a)+sin(2π-α)]的值