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Mathematics 14 Online
OpenStudy (anonymous):

limit at n goes to infinite of tan theta over theta?

OpenStudy (anonymous):

Is this \[ \lim_{\theta\to\infty} \frac{\tan{\theta}}{\theta}?\]

OpenStudy (anonymous):

thats it, yep

OpenStudy (anonymous):

no wait

OpenStudy (anonymous):

oh right, yes thats it, sorry

OpenStudy (anonymous):

Rewrite tan(x) as sin(x)/cos(x)

OpenStudy (anonymous):

Nvm...

OpenStudy (anonymous):

yeah but then i have (sinx/cosx)/x and thats where i got stuck

OpenStudy (anonymous):

i know sinx/x is 1

OpenStudy (anonymous):

not sure what to do about the cos

OpenStudy (anonymous):

Then the cos(x) goes to the denominator by multiplying by cos(x)/cos(x).

OpenStudy (anonymous):

sin(x) and cos(x) is between -1 and 1 as x goes to infinity

OpenStudy (anonymous):

Therefore the limit goes to 0.

OpenStudy (anonymous):

but the denominator would then be xcosx, which would go to infinite, making the whole thing go to 0

OpenStudy (anonymous):

excellent, thank you

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