# Math

posted by
**Allessandra**
.

Differentiate 1/tanx

I got -sec^2 / tan^2x, which is correct, but the answers said I could also simplify this to -cosec^2. How would you do that?

Thanks =)

posted by
**Allessandra**
.

Differentiate 1/tanx

I got -sec^2 / tan^2x, which is correct, but the answers said I could also simplify this to -cosec^2. How would you do that?

Thanks =)