Mathematics
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OpenStudy (anonymous):
derivatives of trigonometric function!
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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
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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) ??
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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
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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
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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