\( \frac{\cos A}{1-\sin A}= \) P W (1) \( \sec A-\tan A \) (2) \( \...

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\( \frac{\cos A}{1-\sin A}= \)
P
W
(1) \( \sec A-\tan A \)
(2) \( \operatorname{cosec} A+\cot A \)
(3) \( \tan \left(\frac{\pi}{4}-\frac{A}{2}\right) \)
(4) \( \tan \left(\frac{\pi}{4}+\frac{A}{2}\right) \)
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