At \[x=\sqrt{\frac{\pi }{2}},\frac{d}{dx}\cos (\sin {{x}^{2}})\]=

1.	At \[x=\sqrt{\frac{\pi }{2}},\frac{d}{dx}\cos (\sin {{x}^{2}})\]=
A.	?1
B.	1
C.	0
D.	None of these
Answer» D. None of these

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At \[x=\sqrt{\frac{\pi }{2}},\frac{d}{dx}\cos (\sin {{x}^{2}})\]=

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