\[\frac{d}{dx}\left[ \frac{2}{\pi }\sin {{x}^{0}} \right]=\]

1.	\[\frac{d}{dx}\left[ \frac{2}{\pi }\sin {{x}^{0}} \right]=\]
A.	\[\frac{\pi }{180}\cos {{x}^{0}}\]
B.	\[\frac{1}{90}\cos {{x}^{0}}\]
C.	\[\frac{\pi }{90}\cos {{x}^{0}}\]
D.	\[\frac{2}{90}\cos {{x}^{0}}\]
Answer» C. \[\frac{\pi }{90}\cos {{x}^{0}}\]

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\[\frac{d}{dx}\left[ \frac{2}{\pi }\sin {{x}^{0}} \right]=\]

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