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Mathematics 19 Online
OpenStudy (anonymous):

wanna get my answer checked please! Find an equation of the tangent line at x = 0 for the given function. y = 3e^x[sin(x)] i had 1 as my final answer.

OpenStudy (anonymous):

is the [sinx] a part of e power?

OpenStudy (anonymous):

no

OpenStudy (anonymous):

ok

OpenStudy (anonymous):

its just 3e to the power of x times sinx

OpenStudy (anonymous):

if i got the question correctly... the answer is 0.

OpenStudy (anonymous):

why

OpenStudy (anonymous):

\[3e ^{x}sinx\]

OpenStudy (anonymous):

yes... you want tan(0) by given function, right?

OpenStudy (anonymous):

no .. i just want the tangent line, so i get the derivative of the function then i sub in 0 for x.

OpenStudy (anonymous):

so i used the product rule and got 3e^x (cosx+sinx)

OpenStudy (anonymous):

so when i subbed in zero i got 1.

OpenStudy (anonymous):

ahhh... yes i think u did well... i didn't got the question... sorry took ur time...

zepdrix (zepdrix):

Sooo bem, that gives you the SLOPE of the tangent line at x=0, now we need to create an equation for the line passing through that point, with the given slope.

zepdrix (zepdrix):

|dw:1351284126936:dw| Hmmm I think you are suppose to get an answer of 3. Check my work a sec, maybe you can tell me what you did differently.

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