化简sin(80°+3α)cos(35°+α)-cos(80°﹢3α﹚sin﹙35°﹢3α﹚
化简sin(80°+3α)cos(35°+α)-cos(80°﹢3α﹚sin﹙35°﹢3α﹚
.[1/cos(-α)+cos(180°+ α )]/[1/sin(540°-α)+sin(360°-α)]=tan^3
为什么根号3sinα+cosα=2sin(α+30°)
已知3sinα-2cosα=0,求(cosα-sinα)/(cosα+sinα)+(cosα+sinα)/(cosα-s
三角函数题2sin^2α-cos^α+sinα*cosα-6sinα+3cosα=0 求(2cos^α+2sinαcos
若3sinα-cosα/sinα+3cosα=1 1、求tanα 2、sinα﹢cosα/sinα-cosα﹢cos^2
sinα=-2cosα,求sin^2α-3sinαcosα+1
Cos(180°+α)*sin(α+360°)/sin(-α-180°)*cos(-180°-α)
化简4sin²α-sinαcosα-3cos²α=0
化简:sin^6α+cos^6α+3sin^2α*cos^2α=?
1.化简sin²α+cosαcos(π/3+α)-sin²(π/6-α)
已知3sinα=cosα,则sinα-2sinαcosα+3cosα+1=