MathematicsMedium63×since 2002Q3712If f(x)=∣2cos4x2sin4x3+sin22x3+2cos4x2sin4xsin22x2cos4x3+2sin4xsin22x∣,f(x)=\left|\begin{array}{ccc} 2 \cos ^4 x & 2 \sin ^4 x & 3+\sin ^2 2 x \\ 3+2 \cos ^4 x & 2 \sin ^4 x & \sin ^2 2 x \\ 2 \cos ^4 x & 3+2 \sin ^4 x & \sin ^2 2 x \end{array}\right|,f(x)=2cos4x3+2cos4x2cos4x2sin4x2sin4x3+2sin4x3+sin22xsin22xsin22x, then 15f′(0)=\frac{1}{5} f^{\prime}(0)=51f′(0)= is equal to :A2B1C0D6Check answerSkip