1. ## Simply expression

Hi
Can someone help me simplify this expression. i tired using different identities but still cannot get the answer.
$sec^2(x)+cosec^2(x)-sec^2(x)cosec^2(x)$

P.S

2. Hello,

Well, that's pretty simple

\begin{aligned}\sec^2(x)+\csc^2(x)&=\frac{1}{\sin^ 2(x)}+\frac{1}{\cos^2(x)}\\
&=\frac{\cos^2(x)+\sin^2(x)}{\cos^2(x)\sin^2(x) } \\
&=\frac{1}{\cos^2(x)\sin^2(x)}\\
&=\boxed{\sec^2(x)\csc^2(x)}\end{aligned}