Yeah I missed this lesson in class because my alarm never went off. So i have plenty of question por vous. :D

f(x) = cos^9(x^4)

not a clue

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- Oct 14th 2007, 07:04 PMpseizure2000More trig differentials
Yeah I missed this lesson in class because my alarm never went off. So i have plenty of question por vous. :D

f(x) = cos^9(x^4)

not a clue - Oct 14th 2007, 07:07 PMKrizalid
Chain Rule rules here!

$\displaystyle f'(x)=9\cos^8(x^4)\cdot(\cos x^4)'$

Can you take it from there? - Oct 14th 2007, 07:16 PMpseizure2000
got it! thanks!