Hello!
Please if I have y=f(sinx)
then
y'(x) should be f'(sinx)cosx
y''(x)= f''(sinx) cos x+f'(sinx)(-sinx)
y'''(x)= f'''(x)-2f''(sinx)sinx-f'(sinx)cos x
Is that correct?
The problem is I shoudl get
y'''(x)=f'''(sinx)cos^3x-3cosxsinxf''(sinx)-f'(sinx)cosx
where did I make the mistake?
Many thanks!!!