Ask your own question, for FREE!
Mathematics 12 Online
OpenStudy (itz_sid):

HELP PLASEPASE

OpenStudy (itz_sid):

@zepdrix It says the answer is DNE. I don't even know how they got that. And SymboLab says otherwise...

zepdrix (zepdrix):

Well remember when we had that alternating business in the last problem? We didn't have a problem because the sequence was approaching 0 the larger that n got. That isn't happening here, we just cycle endlessly through different cosine values. Never converging to any specific one though.

zepdrix (zepdrix):

Oh they do something fancy to prove this though? Looking at subsequences or something?

zepdrix (zepdrix):

i dunno, the page doesn't go down that far lol and im not sure if you get into subsequences at the calculus level.

OpenStudy (itz_sid):

I have no clue. I mean isn't the fraction growing? I dont think it alternates. :/

zepdrix (zepdrix):

Well we know the limits of cosine, right? \(\large\rm -1\le cos\frac x5\le 1\) It will never get larger or smaller than those end values. Doesn't matter how humongous the fraction gets. \(\large\rm -1\le cos\frac{7bajillion}{5}\le 1\)

OpenStudy (itz_sid):

O. right.

Can't find your answer? Make a FREE account and ask your own questions, OR help others and earn volunteer hours!

Join our real-time social learning platform and learn together with your friends!
Latest Questions
Countless7Echos: Ah trying out the whole T.V girl drawing :p (I love drawing eyes)
1 hour ago 7 Replies 5 Medals
kaelynw: starting to draw a hand
1 day ago 16 Replies 2 Medals
Twaylor: Rate it :D (Took 2 days)
2 days ago 7 Replies 0 Medals
XShawtyX: Art, Short Writing Assignment: Imagining Landscapes
2 hours ago 7 Replies 1 Medal
XShawtyX: Chemistry, Help ud83dude4fud83cudffe
3 days ago 13 Replies 1 Medal
kaelynw: tried a lil smt, the arm is off but i like the other stuff
3 days ago 27 Replies 3 Medals
kaelynw: art igg
3 days ago 14 Replies 1 Medal
Can't find your answer? Make a FREE account and ask your own questions, OR help others and earn volunteer hours!

Join our real-time social learning platform and learn together with your friends!