Turunan pertama fungsi f(x) = sin^2(8x-2r)
f'(x) =
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f'(x) = 2(sin(8x-2)}(cos(8x-2)(8)
= 16 Sin(8x-2)Cos(8x-2) atau
= 8(Sin2(8x-2))
= 8sin(16x - 4)