\( (\operatorname{cosec} A-\sin A)(\sec A-\cos A)(\tan A+\cot A)= \) (a) \( -1 \) (b) 2 (c) 0

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\( (\operatorname{cosec} A-\sin A)(\sec A-\cos A)(\tan A+\cot A)= \)
(a) \( -1 \)
(b) 2
(c) 0
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