Find the derivative of the function.y = sec 4x
A. 
= 4 sec 4x tan 4x
B. 
= 4 sec x tan x
C. 
= 4 sec 4x cot 4x
D. 
= - sec 4x tan 4x
Answer: A
Mathematics
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A. 
B. 
C. 
D. 
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