锐角α≠45o,2sinαcosα+2/3sinα-2/3cosα=1求sinα/cosα,cos/sinα为根

问题描述:

锐角α≠45o,2sinαcosα+2/3sinα-2/3cosα=1求sinα/cosα,cos/sinα为根

锐角α≠45°,sinα-cosα≠0,2sinαcosα+2/3sinα-2/3cosα=sin²‎α+cos²α,(2/3)(sinα-cosα)=sin²‎α+cos²α-2sinαcosα,(2/3)(sinα-cosα)=(sin‎α-cosα)²,sin...