Question

Question #4d676

Answer 1

`LHS=(1+1/tan^2x)(1+1/cot^2x)`

`=(1+cot^2x)(1+tan^2x)`

`=csc^2x xxsec^2x`

`=1/(sin^2x xxcos^2x)`

`=1/(sin^2x xx(1-sin^2x))`

`=1/(sin^2x-sin^4x)`