What is the simplified value of $\left(\frac{1}{cosecA + cotA}\right)^{2}$ ?

What is the simplified value of $\left(\frac{1}{cosecA + cotA}\right)^{2}$ ?
1). sec A tan A
2). $\frac{(1-cos A)}{(1 cos A)}$
3). $\frac{(1-cosec A)}{(1 cosec A)}$
4). sin A

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