Help required with differentiation

• May 8th 2007, 03:40 AM
tigerdivision
Help required with differentiation
Hi all!

I have to differentiate the following function using the Product Rule:

f(x) = (cos x)e^-x sqrt 3

Here are my workings so far:

g(x)=(cos x) h(x)=e^-x sqrt 3

f ' (x) = g ' (x) h(x) + g(x) h' (x)

= (-sin x)e^-x sqrt 3 + (cos x)-e^-x sqrt 3

From here I do not know how to proceed further and am not sure whether above working is correct.

TIA
• May 8th 2007, 03:54 AM
qbkr21
Re:
Re:
• May 8th 2007, 04:04 AM
tigerdivision
Thanks but.....
Thanks for your help. However the sqrt 3 is part of the e^-x sqrt3.

Thanks!
• May 8th 2007, 05:06 AM
qbkr21
Re:
Quote:

Originally Posted by tigerdivision
Hi all!

I have to differentiate the following function using the Product Rule:

f(x) = (cos x)e^-x sqrt 3

Here are my workings so far:

g(x)=(cos x) h(x)=e^-x sqrt 3

f ' (x) = g ' (x) h(x) + g(x) h' (x)

= (-sin x)e^-x sqrt 3 + (cos x)-e^-x sqrt 3

From here I do not know how to proceed further and am not sure whether above working is correct.

TIA

RE: