# precalculus

posted by
**Blake**
.

1.csc^2x-1/csc^2x=cos^2x

2.1/1-cosx+1/1+cosx=2csc^2x

3.sinxcosy+cosxsiny/cosxcosy-sinxsiny=tanx+tany/1-tanxtany

posted by
**Blake**
.

1.csc^2x-1/csc^2x=cos^2x

2.1/1-cosx+1/1+cosx=2csc^2x

3.sinxcosy+cosxsiny/cosxcosy-sinxsiny=tanx+tany/1-tanxtany