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Home  >>  EAMCET  >>  Mathematics
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The extreme values of $4 \cos (x^2) \cos \bigg( \large\frac{\pi}{3}$$+x^2\bigg) - \cos \bigg(\large\frac{\pi}{3}$$-x^2\bigg)$ over R, are :

\[\begin {array} {1 1} (a)\;-1,1 & \quad (b)\;-2,2 \\ (c)\;-3,3 & \quad (d)\;-4,4 \end {array}\]
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(a) -1,1
answered Mar 4, 2014 by meena.p
 

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