Question

did i do this right? (1/secx-1)-(1/sec+1)=tan^2x?

Answer 1

I get:
\[2\cot ^{2}(x)\]

Answer 2

Since you have:
\[\frac{ 2 }{ (secx-1)(secx+1) }\]

Answer 3

but your subtracting them how'd you get 2