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Mathematics 6 Online
OpenStudy (anonymous):

derivatives of trigonometric function!

OpenStudy (anonymous):

\[y=(2x+3)^{2}\sin(x-6)\]

OpenStudy (anonymous):

if u want to take the derivative of the equation u should use the product rule. try that

OpenStudy (anonymous):

im a little bit confused

OpenStudy (anonymous):

so for the product rule use uv = u'v + uv', where u = (2x + 3)^2: v = sin(x-6)

OpenStudy (anonymous):

and u' and v' are the deritives of u and v

OpenStudy (anonymous):

still confused?

OpenStudy (anonymous):

yah

OpenStudy (anonymous):

the solving part im confused

OpenStudy (anonymous):

ok so take the deritive of u = (2x + 3)^2, what is it?

OpenStudy (anonymous):

2(2x+3) ??

OpenStudy (anonymous):

the answer should be 4(2x+3)

OpenStudy (anonymous):

why?

OpenStudy (anonymous):

u forgot to take the deritive inside the brackets (chain rule)

OpenStudy (anonymous):

ahh like this 2(2x+3)(2) ??

OpenStudy (anonymous):

yup

OpenStudy (anonymous):

now do it for the v = sin(6x-1)

OpenStudy (anonymous):

6cos(6x-1) ????

OpenStudy (anonymous):

yup

OpenStudy (anonymous):

now put it all together with the equation uv = u'v + uv' and that should be your answer

OpenStudy (anonymous):

a good website if u want to see step by step instructions is http://calc101.com/, but don't get addicted lol

OpenStudy (anonymous):

ok tnx

OpenStudy (anonymous):

the website is not found??

OpenStudy (anonymous):

google calc101 should be the first link

OpenStudy (anonymous):

this is interesting tnx for the info

OpenStudy (anonymous):

np

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