sinα+cosα=√3/3(sinα+cosα)^2=1/3(sinα)^2+(cosα)^2+2sinαcosα=1/31+2sinαcosα=1/32sinαcosα=-2/3sinαcosα=-1/3tanα+cotα=sinα/cosα+cosα/sinα=[(sinα)^2+(cosα)^2]/sinαcosα=1/sinαcosα...