If \( \sin \theta+\operatorname{cosec} \theta=2 \) then the value of \( \sin ^{8} \theta+\operat...

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If \( \sin \theta+\operatorname{cosec} \theta=2 \) then the value of \( \sin ^{8} \theta+\operatorname{cosec}^{8} \theta \) is equal to
(a) 2
(b) \( 2^{8} \)
(c) \( 2^{4} \)
(d) none of these
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