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a) determine the derivative of y = sin2x

b) determine the derivative of y = 2SinxCosx

c) shoe that derivatives in parts a) and b) are equal

d) explain why derivatives in parts a) and be should be equal.

1 answer

a) 2cos2x
b) 2cosx*cosx - 2sinx*sinx = 2cos2x
c) double angle identity

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