\( \sqrt{-4+\sqrt{8+16 \operatorname{cosec}^{4} \alpha \sin ^{4} \alpha}}= \) (a) \( \operatorna...

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\( \sqrt{-4+\sqrt{8+16 \operatorname{cosec}^{4} \alpha \sin ^{4} \alpha}}= \)
(a) \( \operatorname{cosec} \alpha-\sin \alpha \)
(b) \( 2 \operatorname{cosec} \alpha+\sin \alpha \)
(c) \( 2 \operatorname{cosec} \alpha-\sin \alpha \)
(d) \( \operatorname{cosec} \alpha-2 \sin \alpha \)
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