Note:- 1)If y = sin(ax) ; then dy/dx = a*cos(ax)
2) If y = tan(ax) ; then dy/dx = a*sec^2(ax)
y = sin(tan(2x))
dy/dx = y' = cos(tan(2x))*[sec^2(2x)]*2
or, dy/dx = y' = 2*cos(tan(2x))*[sec^2(2x)]
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