Question

1/sin^2 - 1/tan^2?

Answer 1

`1`

Explanation:

Using the identities:
`1/sinx= cscx`
`1/tanx=cotx`
`1+cot^2x= csc^2x`

Start:
`1/sin^2x - 1/tan^2x=`

`csc^2x-cot^2x=`

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

`1`