1.

If \[\sin (\pi \cos x)=cos(\pi sinx),\] then what is one of the values of\[sin\text{ }2x\]?

A. \[-\frac{1}{4}\]
B. \[-\frac{1}{2}\]
C. \[-\frac{3}{4}\]
D. \[-1\]
Answer» D. \[-1\]


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