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If $f ( x ) = \cos ^ { 2 } ( 2 x ) , \text { find } f ^ { \prime } \left( \frac { \pi } { 3 } \right)$

Question 154

Multiple Choice

A) $\sqrt { 3 }$
B) $\frac { \sqrt { 3 } } { 4 }$
C) 1
D) $- 1$
E) $- \sqrt { 3 }$
F) $- \frac { \sqrt { 3 } } { 2 }$
G) $\frac { \sqrt { 3 } } { 2 }$
H) $- \frac { \sqrt { 3 } } { 4 }$

If f(x)=cos⁡2(2x), find f′(π3)f ( x ) = \cos ^ { 2 } ( 2 x ) , \text { find } f ^ { \prime } \left( \frac { \pi } { 3 } \right)f(x)=cos2(2x), find f′(3π​)

Multiple Choice

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If $f ( x ) = \cos ^ { 2 } ( 2 x ) , \text { find } f ^ { \prime } \left( \frac { \pi } { 3 } \right)$

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