Question

Please help me with this calculus problem!



1.a) Differentiate each function:

i) (-pi/2)sin(20x-pi)
=10picos(20x)

ii) sin^2(cos^3(x)+tan(x)
=2cos(cos^3(x)+tan(x))(sin(cos^3(x)+tan(x))(sec^2(x)+3(-sin(x))cos^2(x))

iii) 4x^2sin^2(6x^2-2)
=4(2x)sin^2(2-6x^2)-24x^3sin(2-6x^2)cos(2-6x^2))

1.b) Determine f''(x) where f(x)=cot(4x) and f(x)=sin(x) times tan(x)
I need help with this one.