Find the derivative.y = sin2 9?x

A. 18? sin 9?x
B. 18? sin 9?x cos 9?x
C. sin 18?x
D. 2 cos 9?x


Answer: B

Mathematics

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A. - 
B. , - 
C.
D. ?

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A.
B. prime
C. (x + t)(x + t)
D. (x - t)(x + t)

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