- #1
EvilBunny
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Homework Statement
If f(x) = (3 x )(sin x) (cos x), find f'( x ).
A question I have is , is there anything special to do when you have 3 products instead of 2
The Attempt at a Solution
Well I used the product rule as if am multipling
(3xsinx) (cosx)
but that doesn't seem to get me the answer or maybe Its something about my answer because I put answers in a computer so sometimes its the notation.
here is my final answer
3sin(x)+cos(x)*3x*cos(x)-sin(x)(3x)sin(x)