Question

Question #b0253

Answer 1

`LHS=(cotx-cscx)^2`

`=(cscx-cotx)^2`

`=(1/sinx-cosx/sinx)^2`

`=(1-cosx)^2/(sinx)^2`

`=(1-cosx)^2/(1-cos^2x)`

`=((1-cosx)cancel((1-cosx)))/((1+cosx)cancel((1-cosx)))`

`=(1-cosx)/(1+cosx)`