If \( (\sin \alpha)^{x}+(\cos \alpha)^{x} \geq 1,0\alpha\frac{\pi}{2} \), then (A) \( x \in[2, \...
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0If \( (\sin \alpha)^{x}+(\cos \alpha)^{x} \geq 1,0\alpha\frac{\pi}{2} \), then
(A) \( x \in[2, \infty) \)
(B) \( x \in(-\infty, 2] \)
(C) \( x \in[-1,1] \)
(D) none of these
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