$\frac{1}{\left(tanA+cotA\right)}$  is equal to

$\frac{1}{\left(tanA+cotA\right)}$  is equal to
1). (cosecA + sinA)(secA - cosA)
2). √[(cosecA - sinA)(secA - cosA)]
3). √[(cosecA + sinA)(secA - cosA)]
4). (cosecA - sinA)(secA - cosA)

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